CST, 2365S, His-Tag Antibody

Polyclonal Antibody for studying . Validated for Western Blotting,Immunoprecipitation. Available in 2 sizes. Highly specific and rigorously validated in-house, His-Tag Antibody (CST #2365) is ready to ship. Product Usage Information Western Blotting: 1:1000 Immunoprecipitation: 1:25 Storage Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg/ml BSA and 50% glycerol. Store at -20°C. Do not aliquot the antibody. Protocol Available protocols: Western Blotting, Immunoprecipitation Specificity / Sensitivity His-Tag Antibody detects recombinant proteins containing the 6xHis epitope tag. This antibody recognizes the 6xHis-tag fused to either the amino or carboxy terminus of targeted proteins in transfected cells. This antibody may cross-react with a protein of unknown origin ~60-70kDa. Species Reactivity: All Species Expected Source / Purification Polyclonal antibodies are produced by immunizing animals with a 6xHis synthetic peptide. Antibodies are purified by protein A and peptide affinity chromatography. Background Epitope tags are useful for the labeling and detection of proteins using immunoblotting, immunoprecipitation, and immunostaining techniques. Because of their small size, they are unlikely to affect the tagged protein's biochemical properties. A variety of plasmids contain DNA that encodes an amino-terminal tag consisting of six histidine (6xHis) residues followed by an extended multiple cloning site. The 6xHis tag on the expressed recombinant proteins allows for efficient coupling to Ni2+ affinity resins and purification by single step chromatography (1). As is the case with other protein tag systems (2), this polyhistidine tag can often be cleaved at sites recognized by proteases such as thrombin and enterokinases to isolate the protein of interest (1). Specification REACTIVITY: All SENSITIVITY: Transfected Only SOURCE: Rabbit