1,700+ technical articles by Aladdin Scientific's scientists on reagent selection, reaction mechanisms, assay design and formulation. New every week.
In nucleic acid gel electrophoresis imaging, choosing a stain that matches your imaging system’s optics is key to obtaining high-contrast, low-background bands. GelRed and GelGreen were designed as safer alternatives to ethidium bromide, showing lower cell permeability and undetectable ...
Protein A affinity chromatography exploits the high affinity between bacterial Protein A and the Fc region of IgG to achieve a one-step, highly selective capture. In industrial applications, low-pH elution and alkaline cleaning/sanitization are commonly used. After many cycles of mechanical and ...
Ni-agarose beads are typically blue due to coordination complexes between Ni²⁺ and the immobilized chelating ligand. In purification systems containing reducing agents, metal reduction or drastic changes to the coordination environment can shift the bead color from blue to brown or black.
The blue color of nickel agarose beads arises from coordination between Ni²⁺ and immobilized ligands (e.g., NTA/IDA/TED-type chelators). When loading His-tagged proteins, the local coordination environment changes and the color often becomes temporarily lighter; if strong chelators such as ...
Antibody–drug conjugates (ADCs) combine the high specificity of monoclonal antibodies with the high potency of small-molecule cytotoxins to achieve targeted tumor cell killing, thereby improving efficacy while minimizing systemic toxicity. Compared with unconjugated antibodies or fragments, ...
Metal ions in metalloenzymes and metalloproteins play dual roles in structural support and chemical catalysis. Through coordination chemistry, electrostatic modulation, and reversible changes in valence, they stabilize protein conformations, tune conformational equilibria, and participate in ...
In E. coli expression, induction is critical. The research-standard inducer IPTG (isopropyl β-D-thiogalactopyranoside) is favored for its efficiency, stability, and low cost. However, in GMP-grade production IPTG is tightly restricted due to cell toxicity, chemical-residue risk, and regulatory ...
Proteins face major risks during storage: surface adsorption and aggregation, conformational denaturation, chemical degradation (oxidation/hydrolysis/deamidation), and microbial contamination. Choosing an appropriate buffer system and protectants, together with suitable temperature and ...
When a target protein leaves its native intracellular environment during purification, hydrophobic surfaces can become exposed and misfolding can occur, leading to precipitation, denaturation, loss of activity, and reduced yield. Adding protective components to purification buffers can mimic ...