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Immunohistochemical analysis of paraffin-embedded human breast carcinoma using BiP (C50B12) Rabbit mAb #3177 in the presence of control peptide (left) or BiP Blocking Peptide (right).

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Product Description

This peptide is used to block BiP (C50B12) Rabbit mAb #3177 reactivity in dot blot and western blot protocols.


Quality Control

The quality of the peptide was evaluated by reversed-phase HPLC and by mass spectrometry. The peptide blocks BiP (C50B12) Rabbit mAb #3177 by dot blot.

Product Usage Information

Use as a blocking reagent to evaluate the specificity of antibody reactivity in Western immunoblotting and dot blot protocols.


Storage: Supplied in 20 mM potassium phosphate (pH 7.0), 50 mM NaCl, 0.1 mM EDTA, 1 mg/ml BSA and 5% glycerol. 1% DMSO. Store at –20°C.

Secretory and transmembrane proteins are synthesized on polysomes and translocated into the endoplasmic reticulum (ER). Inside the ER, these proteins are often modified by disulfide bond formation, amino-linked glycosylation and folding. To help proteins fold properly, the ER contains a pool of molecular chaperones including BiP. BiP was identified as an immunoglobulin heavy chain binding protein in pre-B cells (1,2). It was also found to be induced at the protein level by glucose starvation (3). When protein folding is disturbed inside ER, BiP synthesis is increased. Subsequently, BiP binds to misfolded proteins to prevent them from forming aggregates and assists in proper refolding (4).


1.  Wabl, M. and Steinberg, C. (1982) Proc Natl Acad Sci U S A 79, 6976-8.

2.  Haas, I.G. and Wabl, M. (2002) Nature 306, 387-9.

3.  Munro, S. and Pelham, H.R. (1986) Cell 46, 291-300.

4.  Kohno, K. et al. (1993) Mol Cell Biol 13, 877-90.


Entrez-Gene Id 3309
Swiss-Prot Acc. P11021


For Research Use Only. Not For Use In Diagnostic Procedures.
Cell Signaling Technology is a trademark of Cell Signaling Technology, Inc.

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BiP Blocking Peptide