protein experiment

When proteins are expressed at high levels in E. coli and other expression hosts, it is common to find that most of them are insoluble and exist in insoluble fo

Protein molecules of different sizes enter the colloidal filtration column and can be separated according to their molecular weight differences; it is a widely

Protein extraction experiments are basic operations for performing experimental analysis of proteins and can be used for (1) protein isolation (2) protein funct

Protein gel electrophoresis is commonly used to (1) analyze molecular biology, genetics, and biochemistry (2) preparative techniques (3) partially purify molecu

Protein expression, isolation and purification can: (1) explore and study the function of genes and the mechanism of gene expression regulation; (2) be used for

Serum protein agarose gel electrophoresis can be applied to (1) determine the protein content of serum and (2) diagnose diseases.

Ribonuclease protection assay (RPA) is a new method for quantitative analysis of mRNA developed in the last decade. The basic principle is to hybridize the labe

Measurement of plasma free hemoglobin can be used to (1) approximate the value of red blood cells used. (2) Elevations and decreases in hemoglobin can be refere

The immunoglobulin extraction technique can be applied to (1) infer the body's humoral immune function, and (2) diagnose high and low Ig caused by certain disea

Protein sequencing can be used to: (1) identify proteins; (2) characterize post-translational modifications of proteins. (3) Analyze the relationship between pr

The study of membrane ion channel properties using the membrane clamp is an arduous, detailed and complicated work, which requires a high level of technical lev

Antisera are sera containing a certain class of antibody molecules with specific immune functions, generally prepared from animals that have been artificially i

Hydroxylase, also known as hydroxylase, is a type of oxygenase, an enzyme that catalyzes the reaction that utilizes oxygen molecules to form hydroxides (phenols

High performance reversed-phase liquid chromatography can be applied to: Separate non-polar, polar or ionic compounds.

Solid-phase peptide synthesis technology is a key technology of modern protein chemistry, and also a technology of great influence and significance to modern mo

Ion exchange chromatography is a chromatographic method in which ion exchange genes (CM, SP, Q, DEAE, etc.) are bonded to certain inert carriers (cellulose, cro

Crushed soybean products were mixed with a neutral urea buffer solution and kept at 30°C for 30 min before urease catalyzed the reaction of urea hydrolysis to

High performance resistive liquid chromatography, also known as volumetric resistive chromatography (SEC), molecular sieve chromatography, gel filtration, etc.

Hepatic drug enzymes is an abbreviation for the mixed function enzyme system of liver microsomes. This enzyme system is a group of mixed-function oxidative enzy

ATPases, also known as adenosine triphosphatases, are a class of enzymes that catalyze the hydrolysis of adenosine triphosphate (ATP) to adenosine diphosphate (

To isolate and purify proteins, the target protein is firstly extracted from the raw material, then a large number of impurities are removed by the method of co

Glucuronosyltransferases are enzymes that catalyze the combination of indirect bilirubin with glucuronic acid to form glucuronides (i.e., direct bilirubin).

Glutathione S-transferases are enzymes that catalyze the reaction of exogenous compounds with electrophilic substituents with endogenous reduced glutathione (GS

Metallothionein (MT) is a metal- and sulfur-rich inducible protein, which can be induced by certain metals (Bi, Zn, Cu, etc.), hormones (glucocorticoids), cytot

The first step in capturing interacting proteins is to construct a decoy protein, which is a fusion of LexA to the target protein. A series of control experimen

Immunofluorescence localization of nuclear proteins can be applied to (1) localize intracellular distribution of nuclear proteins and (2) viral studies.

Cardiac sarcoplasmic reticulum calcium-ATPase (SERCA2a) plays a major role in the regulation of calcium homeostasis in cardiomyocytes, and studies on the gene t

Metallothionein is a short cysteine-rich peptide produced by microorganisms and plants as a metal-binding protein with a high affinity for a wide range of heavy

A probe is a small fragment of single-stranded DNA or RNA (approximately 20 to 500 bp) that is used to detect a nucleic acid sequence complementary to it. Doubl

A technique for selecting a target from a population based on the principle of antigen-antibody interaction. For example, antibodies are used to detect proteins

Capture assays for interacting proteins are subjected to two sequential bulk yeast plate screening processes. Saccharomyces cerevisiae contains the lexA fusion

Cardiac sarcoplasmic reticulum calcium-ATPase (SERCA2a) plays a major role in the regulation of calcium homeostasis in cardiomyocytes, and studies on the gene t

The pGEX vectors can be used to express and purify peptides (including short peptides) used as immunogens and biochemical and biological reagents, or to constru

Molecular exclusion chromatography, also known as gel chromatography, is the use of different molecular sizes of the separated substances lead to different degr

Recovery test is a type of "control test". When the analyzed sample is complex and not completely clear, a known amount of the measured component is added to th

The affinity molecules with special structure are made into solid-phase adsorbent and placed in the chromatography column, when the protein mixture to be separa

In this experiment, the Km value of sucrase was calculated by using the amount of products (glucose and fructose) formed by sucrase hydrolyzing different concen

Sucrase (inver tase) (β-D-fructofuranoside fructohydrolase) (EC. 3 . 2 . 1 . 26 ) catalyzes the hydrolysis of α-fructofuranoside bonds in non-reducing sugars

Since host protein synthesis is essentially terminated when recombinant proteins are expressed, in vivo metabolic labeling is a sensitive method for detecting r

It is of interest to identify phosphorylated amino acid residues in proteins. Phosphorylation occurs at serine, threonine, and methionine in proteins, and the i

Many membranes can be used as solid-phase supports for protein electrotransfer, such as diazotized cellulose membranes (DPT, DBM), DEAE-cellulose membranes, nyl

The reaction of α-amino group of protein with dansulfonyl chloride (DNS-Cl is a fluorescent substance) produces DNS-protein, which can be hydrolyzed to produce

The isoelectric points of various proteins in mixed protein samples are different, and the amount of electrostatic charge carried by various proteins is differe

In this experiment, yeast RNA was used as the material, and the RNA was hydrolyzed into mononucleotide by alkali, then separated by ion exchange column chromato

The purpose of this experiment is to understand the basic principles and operation of salting out graded separation of proteins; to understand the basic princip

Gel filtration is also known as exclusion chromatography, molecular sieve chromatography and gel chromatography. The purpose of this experiment is to understand

Protein is the material basis of life, without which there is no life. It is therefore a substance that is closely associated with life and with all forms of vi

A gene fusion expression system using the E. coli trxA gene product-thioredoxin as a fusion partner is particularly suitable for the expression of high yield so

This experiment describes the process of calreticulin sample activation measurement. This experiment is from the Experimental Guide for Protein Purification and

Source of content: Guangdong Pharmaceutical University Laboratory Instruction Manual.

Since the benzene rings of tyrosine and tryptophan residues in protein molecules contain conjugated double bonds, proteins have the property of absorbing ultrav

The next step in the purification of calmodulin is anion exchange chromatography with DEAE resin. This step takes advantage of the fact that calmodulin is a str

Calmodulin is found in all mammalian tissues and also in other eukaryotic organisms. It is one of the most ubiquitous and highly conserved proteins known. This

For the purification of calmodulin, two different operations were performed for the crude graded separation of smooth muscle tissue extracts: ammonium sulfate p

The titration curve is a curve presenting the mobility of each component of the sample against pH, for which the gel containing the carrier amphoteric electroly

This protocol has been developed over many years of practice, and it is not an example of a first attempt to purify a protein by HIC chromatography. For calmodu

After serum lipoproteins are stained with Sudan black B and electrophoresed in pH 8.6 barbiturate buffer with agarose, the lipoproteins can be divided into diff

Serum protein polyacrylamide gel has the advantages of good mechanical strength, elasticity, transparency, high chemical stability, non-electroosmosis, simple e

This experiment describes the cyanogen bromide cleavage process of calmodulin. This experiment is from the Experimental Guide for Protein Purification and Ident

Goldenberg and Creighfn (1984) introduced the use of polyacrylamide gels containing a concentration gradient of urea to analyze the folded state of proteins. A

This experiment describes the trypsin digestion process of calmodulin. This experiment was derived from Protein Purification and Identification Laboratory Guide

This experiment describes how to load a gel filtration column. This experiment is from Protein Purification and Identification Laboratory Guide by Houzhu Zhu.

Protein blotting, which uses immunological methods to measure the amount of a particular protein. This experiment was derived from Protein Purification and Iden

This experiment describes how to purify oligonucleotides by preparative gel electrophoresis. This experiment is from Protein Purification and Identification Lab

This experiment describes the preparation process of DNA affinity medium. This experiment is from the Laboratory Guide for Protein Purification and Characteriza

There is a great need for a rapid and accurate method for quantitatively determining the protein concentration in a sample so that one can follow the recovery o

This experiment describes the preparation of heparin-Sepharose CL-2B. This experiment was derived from the Experimental Guide for Protein Purification and Ident

This experiment describes the process of Sephacryl S-300 HR column chromatography of HeLa cell nucleus extract. This experiment is from the guide to protein pur

In this unit, a simpler method was used to determine its stimulatory effect on core RNA polymerase transcription from a non-specific template poly(dAT) start. T

This experiment describes the fragmentation of E. coli cells and the preparation of inclusion bodies. This experiment is from the Laboratory Guide for Protein P

This experiment introduces the related operation of affinity chromatography. This experiment is from the Laboratory Guide for Protein Purification and Identific

In this experiment, we used the same complementary oligonucleotide used for DNA affinity chromatography (see the end of the Introduction to Experiment 3 for the

In this experiment, nuclear extracts were prepared from HeLa cells essentially as described by Dignam et al. (1983). This basic method is probably the most comm

This experiment introduces the method of immunoaffinity chromatography. This experiment is from the Laboratory Guide for Protein Purification and Identification

The purpose of this section is to provide an abbreviated set of working procedures for how to use a series of experiments similar to those described in this uni

Insulin binds to its receptor with high affinity (KD~109 mol/L), and this ability allows us to estimate the number of insulin receptors in even fairly crude pre

Since proteins can be separated with high resolution on SDS gels and sensitive staining can be given with Caumas Brilliant Blue (CBB), the purity of the protein

This experiment describes how much time it takes for a protein to bind to an immunoaffinity medium. This experiment is from the Protein Purification and Identif

The method described by Neville (1968) works well for isolating murine liver plasma membranes, but is not necessarily applicable for isolating plasma membranes

This experiment describes the Neville method for isolation of liver plasma membrane. This experiment is from the guide to protein purification and characterizat

When a protein is electrophoresed under conditions that keep its natural conformation constant, its mobility can be used as a measure of its homogeneity. Since

In routine protein spot blotting, the blotting membrane is closed for 1 hour, reacted with primary antibody for 1 hour, and then reacted with secondary antibody

This experiment describes about the process of solubilization and activity determination of insulin receptor. This experiment is from the guide to protein purif

Protein concentrations have traditionally been determined by the method of Lowry and co-workers (Lowry et al., 1951) using the Folin-Ciocalteau reagent, but thi

This experiment describes the amount of polyethyleneimine needed to precipitate σ32 and RNA polymerase. This experiment was derived from Protein Purification a

Although TriumX-100 is a good descaling agent for solubilizing insulin receptors from murine liver plasma membranes, it may not be suitable for solubilization o

This experiment describes the amount of sodium N-dodecyl sarcosinate required for solubilizing inclusion body precipitation. This experiment is from the Laborat

This experiment describes the process of lectin affinity chromatography on solubilized receptors. This experiment was derived from Protein Purification and Iden

TCA precipitation experiments are mainly used for (1) precipitation purification of proteins and (2) extraction of specimen compounds.

This experiment describes the preparation of SDS-PAGE protein samples.

In the structural and functional analysis of proteins (phosphorylated proteins), it is useful to be able to separate phosphopeptides from unmodified (unphosphor

This experiment describes about the cross-linking process of insulin receptor with [125I] insulin. This experiment is from the Experimental Guide for Protein Pu

This experiment describes the process of gel staining silver staining. This experiment is from the Protein Purification and Identification Laboratory Guide by Z

Here, we introduce this procedure by taking the coupling of ligand to Affi-Gel10 as an example. This experiment was derived from Protein Purification and Identi

This experiment describes about the analysis of insulin receptor glycosylation. This experiment is from the Protein Purification and Identification Lab Guide by

In this experiment, we used insulin agarose column chromatography as the final step in insulin receptor purification. This method utilizes the high affinity bin

Oxidation of proteins with peroxyformic acid is a simple and effective method of partially denaturing proteins and stabilizing sulfur-containing amino acids. Pe

One of the most important aspects of molecular biology is the analysis of trace proteins, making possible the cloning of cDNA sequences encoding the proteins to

In this experiment, we will examine the insulin-stimulated tyrosine kinase activity of the insulin receptor. The phosphorylated receptor will be detected with a

Another useful alternative to TCA precipitation is the use of an acidified acetone-methanol mixture. Acidification helps to remove SDS from the sample by dissol

Improvements in the biochemical properties of proteases can be achieved through misdirected mutagenesis and DNA hybridization of the enzyme genes. The hybridiza

The doping of amino acid analogs is becoming increasingly useful. The targeted incorporation of non-natural amino acids has made it possible to use chemical bio

Computational methods have always played an important role in protein design. This work focuses on searching the protein sequence space to find one or several p

Despite their apparent simplicity, coiled coil (Coiled Coil) modules are highly specialized and are important in understanding tertiary structure and its format

Calmodulin (CaM) is a ubiquitously distributed protein involved in calcium-involved signaling. Upon Ca2+ influx, CaM acquires a strong affinity for binding vari

Isoelectric focusing (IEF for short) is a new technique that appeared in the mid-sixties. In recent years, IEF has made new progress and has rapidly developed i

Among DNA-binding modulators, (Cys)2(His)2-type zinc-finger modulators have a large potential for manipulation. Zinc finger modulators provide an attractive fra

When designing protein libraries for screening, we must do everything possible to generate a diversity of protein variants within the physical limits of what ca

Site-specific nucleic acid endonucleases are involved in many aspects of nucleic acid biochemistry. Restriction enzymes and related enzymes have become the para

We developed the use of the 10th fibronectin type III structural domain (FNfnlO) of human fibronectin as a framework to show the use of multiple surface chain s

The use of DNA mashups to mimic natural evolutionary processes is a common approach to optimize DNA and protein properties. Here we present a new development in

Compartmentalized self-replication (CSR) is a novel approach to the directed evolution of proteases, especially polymerases. In the simplest form of CSR, it con

This chapter describes a method for improving the level of fusion protein presentation on the surface of M13 phage particles. Introduction of a mutation to the

Improving enzyme stability is an ideal design step for modifying enzymes to exercise their activity under extreme conditions, such as high temperatures, as well

Here we present a new strategy for linking genotype and expression in vitro for the selection of functional proteins. In this strategy, the A chain of the ricin

The field of protein engineering is primarily concerned with the most fundamental sequence determinants regarding the design of new enzyme activities or folds,

Environmental contaminants can affect many intracellular enzyme activities. The effects of enzyme inhibitors on the proteome can be determined using bidirection

Recombinant proteins are important tools for studying biological processes. Expression systems are needed for their preparation. The choice of a suitable expres

Bacterial expression systems are available in a wide variety of vectors and host bacteria, and the short proliferation time of most engineered bacteria not only

Pollution of the marine environment is a growing concern because it can affect humans and other natural species. The application of proteomic methods to monitor

Outstanding growth is expected in novel primary molecules and biosimilar entities. Some of the advances are improved analysis, development and interactions. Num

This method is mainly used to maintain the stability of proteins.

Unique among chromatographic techniques for protein purification, gel filtration separates proteins based on the relative size of their molecular masses. In con

Proteomics and structural genomics require protein extraction methods that allow the simultaneous screening of hundreds of proteins on different combinations of

This chapter will begin with an introduction to the basic baculovirus-insect expression system, Beijing Information, and then focus on recent advances that have

Most proteins are prepared using recombinant expression techniques. During the cloning process, additional residues or tags can be added to the N- or C-terminus

Reports show that in the past decade, a variety of highly efficient transient transfection methods have been developed that meet or exceed these requirements. C

This chapter describes electrophoretic-based protein assays, focusing on the current methods for total protein assay, post-translational modification (PTM) assa

SDS-PAGE has proven to be an extremely useful analytical method in determining the number and size of peptides in a sample. It also has the ability to separate

Although many different precipitation methods have been used over the past 100 years, AS precipitation has been the most widely used, especially for acidic prot

If the sample volume is insufficient for direct sequencing, the peptide can be degraded by manual Edman degradation to determine the location of the phosphoryla

This experiment provides steps starting from inoculation of candidate hybridoma clones into a 96-well culture plate all the way through to isolation of a hybrid

More information about phosphopeptides can be obtained by digestion with sequence-specific proteases or cleavage with site-specific chemicals. From The Compact

All forms of affinity chromatography require the formation of a specific interaction between two components by which one of the components can be purified. Immu

CE is particularly useful for separating specific peptides from complex mixtures such as proteolytic products. The following protocol describes the use of the P

Hydroxyapatite (HA) is a calcium phosphate-based hydroxylate that has been used extensively in the chromatographic separation of proteins, mainly in 1991-2009,

No method can directly quantify the purity of a protein sample. Typically, protein purity determination involves evaluating the level of specific impurities or

Proteins can be separated on coated or uncoated capillary columns, and the choice of separation protocol depends on the specific properties of the target protei

Membrane proteins play a key role in biological processes. They are involved in cell-cell and cell-matrix interactions, cell organelle and cell formation, trans

Protein kinases are analyzed using labeled donor substrates, and the accumulation of markers in protein or peptide acceptor substrates is readily detected when

Protein kinases are analyzed using labeled donor substrates, and the accumulation of markers in protein or peptide acceptor substrates is readily detected when

Protein kinases are analyzed using labeled donor substrates, and the accumulation of markers in protein or peptide acceptor substrates is readily detected when

The spotted filter binding method is a rapid method for the initial determination of protein content. This method is particularly useful for screening useful fr

Although inclusion bodies are mixtures of unnatural forms of expressed proteins, the peptide chain itself is intact, or the primary structure is correct. One ad

Batch chromatography is simple and fast, suitable for situations where protein resolution is not required, and an effective means of concentrating proteins. Sou

Non-denaturing gel electrophoresis, also known as natural gel electrophoresis. The separation of a protein in a gel depends on its charge and molecular size. Wh

The main features of capillary electrophoresis are high column efficiency (N＞105-106), short analysis time, low consumption of sample volume and reagents, mult

The Lowry method is a standardized, rapid method for protein quantification and has been widely used to remove interfering substances by protein precipitation p

Protein kinases are analyzed using labeled donor substrates, and the accumulation of markers in protein or peptide acceptor substrates is readily detected when

This section will focus on the solid-phase technique of ligand solidification on agarose gels activated with cyanogen bromide. The vast majority of ligands, suc

The use of gene fusion expression systems to express exogenous genes in E. coli has become increasingly popular. The reason for this is largely attributed to th

The use of gene fusion expression systems to express exogenous genes in E. coli has become increasingly popular. The reason for this is largely attributed to th

Dye-ligand chromatography is not really affinity chromatography because they are not natural ligands for the proteins to which they bind. However dye columns bi

Gel filtration chromatography is an important protein purification technique, also known as size exclusion, gel exclusion, molecular sieve, or gel filtration ch

Content from Compact Molecular Biology Laboratory Guide (5th Edition)

Source : Proteomics: From Sequence to Function.

Interacting cloning (also known as expression cloning) is used to identify and clone proteins encoding proteins that interact with a target or 'bait' protein. T

Antibody affinity purification is one of the most effective methods in protein purification. This step alone often results in 1000 to 10,000-fold purification.

Ion exchange chromatography is the most widely used of the chromatographic means for purifying proteins. It has a high resolution for proteins, is easy to perfo

Lectins are proteins that reversibly bind carbohydrates. Because most lectins have at least two carbohydrate binding sites per molecule, they can precipitate gl

Source : Proteomics: From Sequence to Function.

In vivo immunostaining can be used for the detection of modified poxvirus Ankara (MVA) and also for the identification of proteins expressed on the cell surface

N-glycosylation site studies are one of the most important prerequisites for understanding the function of sugar chains

Studying RNA-protein binding in cells

Source: Laboratory Guide to Proteins and Proteomics

When analyzing protein interactions using Far Western blot, the target protein is immobilized on a solid support membrane and then probed with a non-antibody pr

This experiment describes the application of proteins fused to glutathione-S-transferase (GST fusion proteins) to affinity purify other proteins, also known as

Source:Laboratory Guide to Proteins and Proteomics

Source: Laboratory Guide to Proteins and Proteomics

Determination of protein concentration in samples

Source: Laboratory Guide to Proteins and Proteomics

Source: Laboratory Guide to Proteins and Proteomics

Extraction of total protein from adipose tissue and cells

Fluorescent staining of protein fibers

Grind the plant material in liquid nitrogen, make some cells broken, further make the plant cells lysed in lysis solution, precipitate protein with sodium aceta

The purpose of this experiment is to learn how to identify RNA by formaldehyde denaturing gel electrophoresis. Agarose gel electrophoresis is often used for the

The rate of sucrose hydrolysis was determined by measuring the amount of reducing sugars (glucose and fructose) produced, and in this experiment, the unit of su

Scopes published a simple method for determining the extinction coefficient (E) of proteins (Scopes, 1974). This method is based on the fact that although most

When the dilute salt solution of DNA is heated to 80~100 ℃, the double helix structure will be disintegrated, the two strands will be separated, and a random c

This experiment describes how much time it takes to remove sodium N- dodecyl sarcosinate by dialysis. This experiment is from the Laboratory Guide for Protein P

Isoelectrofocusing, abbreviated as IEF or EF, was established in the 1960s as a means of separating and analyzing proteins, and has evolved rapidly over the pas

Protein kinases are analyzed using labeled donor substrates, and the accumulation of markers in protein or peptide acceptor substrates is readily detected when

A relatively simple and effective measure of protein purity is obtained by determining the ultraviolet (UV) spectra of purified proteins. Even if sodium dodecyl

This experiment describes the solubilization, refolding and ion exchange chromatography of inclusion body precipitation (σ32). This experiment was derived

The aim of this experiment was to further purify sucrase protein by column chromatography, using DEAE cellulose resin as an ion-exchange agent for hierarchical

Although most proteins bind approximately the same amount of dye per milligram, there is still a 10% or greater variation in the ability to bind dye between pro

The bicinchoninic acid (BCA) assay is a new and improved Lowery assay that has recently been developed, with a simple reaction and virtually no influence of int

Cardiac myofibrillar ATPase is Ca2+, Mg2+ ATPase, which breaks down ATP into ADP and Pi and releases energy to provide myofibrillar contraction needs. Myofibril

One of the biological activities of TNF is its ability to directly kill tumor cells.TNF binds to the corresponding receptor and then moves into the cell, where

This experiment describes what dialysis conditions lead to the highest yield of soluble refolded σ32 monomer. This experiment is from the guide to protein

The purpose of this experiment is to master the basic principles and methods of mass preparation of animal genomic DNA by salt solubilization method, according

Fusion proteins are generally used as antigens to stimulate antibody production and in many cases for biochemical analysis. Two widely used E. coli expression s

The purification of PPO can be applied to (1) the study of PPO nutritional mechanisms and (2) PPO physiological mechanisms and regulation.

Since the concentration of the polyacrylamide gel can be prepared on demand, two electrophoresis systems, the "Continuous System" and the "Discontinuous System,

Reversible staining of proteins on PVDF membranes can be used for: confirming the transfer of proteins to PVDF membranes during Western hybridization.

The Lowry colorimetric method is one of the most sensitive methods for protein determination. The color development principle of this method is the same as that

This experiment describes the amount of salt needed to elute σ32 and RNA polymerase from PEI precipitation. This experiment is from the Protein Purificati

Lactate dehydrogenase is present in all glycolytic cells, and catalyzes the dehydrogenation of lactate to form pyruvate or the reduction of pyruvate to lactate

The hepatic cytochrome P450 system plays an important role in the metabolism of drugs by converting them from hydrophobic to more easily excreted hydrophilic fo

Membrane proteins are protein molecules present in the cytoplasmic membrane of cells and play important roles in intracellular molecular transport, energy metab

The ability of protein molecules to crystallize has been reported for more than 170 years, and the discovery of X-rays by Rntgen WC in 1895 and X-ray diffractio

The pentose phosphate pathway is an oxidative catabolism of glucose that produces NADPH and synthesizes ribose phosphate, which provides the raw material for nu

Protein-protein interactions play an important role in a variety of life processes such as biocatalysis, transporter, signaling, immunity, cellular regulation,

Determination of total protein content based on protein light absorption properties is based on the light absorption properties of different chemical bonds of p

Glucose undergoes a 10-step metabolic reaction of glycolysis to produce keto acid, which is then further produced as lactate or decarboxylated into acetyl coenz

The isoelectric point of a protein is one of the important properties of proteins. Determination of isoelectric point of proteins is important for understanding

DNA enzyme I footprinting analysis is an effective method for detecting and characterizing the sequence-specific binding ability of transcription factors to DNA

Determination of total protein content based on the elemental composition of proteins is a method of direct analysis based on the characteristics of the element

The exact molecular weight of a protein is the sum of all the atomic weights contained in the molecule. Currently, there is one main method used to determine th

NADPH-Cytochrome C (P-450) is a heme protein that is a terminal oxidase due to the fact that when it is in its reduced form, it combines with carbon monoxide to

Yeast two-hybrid (yeast two-hybrid) is an experimental system for studying the effects of interactions between trans-acting factors on the transcriptional regul

Oligomerization refers to the formation of dimers, trimers, tetramers or long chain molecules (oligomers) between monomeric compounds. In a biological context,

E. coli protein expression is a commonly used protein expression system. E. coli is a common bacterium, which has been widely used in the field of bioengineerin

A protein expression system is a system consisting of a host, an exogenous gene, a vector, and auxiliary components. The vector contains an exogenous gene fragm

Proteins are amphoteric electrolytes and exhibit charged properties in solutions above or below the isoelectric point. These charged proteins migrate by swimmin

The target gene transcriptional regulator original is constructed onto the firefly luciferase reporter gene plasmid, and co-transfected with the sea kidney luci

Nucleotide-binding oligomerization domain-like receptor family, pyrin domain-containing 3 (NLRP3) inflammatory vesicles have been well studied in recent years.

Amino acids are mainly used in the body to synthesize proteins, peptides and other nitrogenous substances that are unique to the body; on the other hand, they c

Acid phosphatase (ACP) is widely found in various cells, and is often abnormally expressed in some cancer cells. Sodium p-nitrophenol phosphate is used as the substrate of ACP, which can be hydrolyzed under alkaline conditions to produce yellow p-nitrophenol, and ACP can be quantitatively ...

Lipid metabolism is an important source of energy supply for the body, and an imbalance between lipid synthesis and catabolism triggers lipid metabolism disorde

As highly differentiated multinucleated giant cells, osteoclasts are mainly derived from monocyte/macrophage hematopoietic stem cell line, which is a kind of ce

His-Tag is the most common tag used in the purification of recombinant protein expression and can be used for initial purification of most proteins (soluble or

In the process of tumor development, tumor tissues are often in a state of hypoxia and low nutrition. Under such conditions, due to the activation of angiogenic