What reagent grades, purity labels and specifications mean: ACS/AR, HPLC, electronic grade and tag-grade proteins, in 190+ guides from Aladdin Scientific.
GST tag grade is a product quality and technical standard level established around the GST (glutathione S-transferase) fusion tag, glutathione-based affinity media, and GST-based functional/interaction assay systems. This grade emphasizes systematic control of key factors such as GST fusion ...
HA tag grade is a product quality and technical standard level established around the HA (hemagglutinin) short peptide epitope tag and its associated immunodetection system. This grade focuses on the performance of the HA tag and its matched antibodies/affinity media in terms of specificity, ...
His tag grade is a product quality and technical standard level defined around the His (polyhistidine) fusion tag and immobilized metal affinity chromatography (IMAC) systems. This grade focuses on recombinant protein expression, affinity purification, and downstream structural/functional ...
MBP tag grade is a product quality and technical standard level established around MBP (maltose binding protein) fusion tags and their maltose/starch-based affinity chromatography systems. This grade emphasizes performance of the MBP tag, the corresponding affinity media and buffer systems, and ...
Strep II tag grade is a product quality and technical standard defined around the Strep-tag II peptide and engineered streptavidin-type affinity systems (for example, Strep-Tactin–type media). This grade emphasizes high-specificity binding, mild elution, and low background for Strep ...
SUMO tag grade is a product quality and technical standard defined around SUMO (small ubiquitin-like modifier) fusion tags, their associated affinity purification systems, and SUMO protease–mediated tag removal processes. This grade emphasizes improving solubility and folding quality during ...
In scientific research and production, the same chemical can yield completely different experimental results if its purity and impurity profile are not the same. A “grade” is essentially a combination of convention and standardized description for purity and impurities. It allows data from ...
In the domestic market, the terms “High-purity, High Purity, Extra pure, EP are commonly used to describe a class of high-grade reagents whose purity and impurity control are clearly superior to conventional analytical reagent (AR) grade. Many textbooks characterize high-purity reagents as ...
The “Ultra pure” grade generally refers to reagents that, on top of conventional high-purity specifications (for example, solids/organic compounds typically with an assay of ≥99%, and water or acids characterized by conductivity or impurity levels), are subjected to stricter and ...
