News from the Bench

Discover what’s going on at CST, receive our latest application notes and tips, read our science features, and learn about our products.


Antibody Guarantee

CST Antibody Performance Guarantee



Find answers on our FAQs page.


Visit PhosphoSitePlus®

PTM information and tools available.



Product Usage Information

Storage: Supplied in 136 mM NaCl, 2.6 mM KCI, 12 mM sodium phosphate (pH 7.4) dibasic, 2 mg/ml BSA, and 50% glycerol. Store at –20°C. Do not aliquot the antibodies.

Specificity / Sensitivity

GST (91G1) Rabbit mAb (Biotinylated) detects transfected GST fusion proteins.

Source / Purification

Monoclonal antibody is produced by immunizing animals with a GST fusion protein.

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.

Glutathione S-transferase (GST) is a widely used fusion partner, since it provides both an easily detectable Tag and a simple purification process with little effect on the biological function of the protein of interest. Numerous vectors containing GST-Tag have been developed for both prokaryotic and eukaryotic systems over the past decade (1-3).

1.  Guan, K.L. and Dixon, J.E. (1991) Anal Biochem 192, 262-7.

2.  Davies, A.H. et al. (1993) Biotechnology (N Y) 11, 933-6.

3.  Yu, J. et al. (1998) Mol Cell Biol 18, 1379-87.

For Research Use Only. Not For Use In Diagnostic Procedures.
Cell Signaling Technology is a trademark of Cell Signaling Technology, Inc.
U.S. Patent No. 5,675,063.

GST (91G1) Rabbit mAb (Biotinylated)