Cell Signaling Technology

Product Pathways - Translational Control

Calnexin (C5C9) Rabbit mAb #2679

Applications Reactivity Sensitivity MW (kDa) Isotype
W IHC-P IF-IC H Mk Endogenous 90 Rabbit

Applications Key:  W=Western Blotting  IHC-P=Immunohistochemistry (Paraffin)  IF-IC=Immunofluorescence (Immunocytochemistry)
Reactivity Key:  H=Human  Mk=Monkey
Species cross-reactivity is determined by western blot. Species enclosed in parentheses are predicted to react based on 100% sequence homology.

Protocols

* Product-specific protocol.

Specificity / Sensitivity

Calnexin (C5C9) Rabbit mAb detects endogenous levels of total calnexin protein.

Source / Purification

Calnexin (C5C9) Monoclonal antibody is produced by immunizing animals with a synthetic peptide corresponding to the sequence of human calnexin.

Western Blotting

Western Blotting

Western blot analysis of extracts from PANC1, HepG2 and A204 cells using Calnexin (C5C9) Rabbit mAb.

IHC-P (paraffin)

IHC-P (paraffin)

Immunohistochemical analysis of paraffin-embedded human breast carcinoma using Calnexin (C5C9) Rabbit mAb in the presence of control peptide (left) or antigen-specific peptide (right).

IF-IC

IF-IC

Confocal immunofluorescent analysis of HeLa cells using Calnexin (C5C9) Rabbit mAb (green). Actin filaments have been labeled using DY-554 phalloidin (red). Blue pseudocolor = DRAQ5® #4084 (fluorescent DNA dye).


Background

Secretory and transmembrane proteins are synthesized on polysomes and translocate into the endoplasmic reticulum (ER) where they are often modified by the formation of disulfide bonds, amino-linked glycosylation and folding. To help proteins fold properly, the ER contains a pool of molecular chaperones including calnexin. Calnexin was first identified as being involved in the assembly of murine class I histocompatibility molecules (1,2). Calnexin is a calcium-binding protein embedded in the ER membrane that retains the newly synthesized glycoproteins inside the ER to ensure proper folding and quality control (3-5). The specificity of calnexin for a subset of glycoproteins is defined by a lectin site, which binds an early oligosaccharide intermediate on the folding glycoprotein (5).

  1. Degen, E. and Williams, D.B. (1991) J. Cell Biol. 112, 1099-1115.
  2. Ahluwalia, N. et al. (1992) J. Biol. Chem. 267, 10914-10918.
  3. Rajagopalan, S. et al. (1994) Science 263, 387-390.
  4. Bergeron, J.J. et al. (1994) Trends Biochem. Sci. 19, 124-128.
  5. Williams, D.B. (2006) J. Cell Sci. 119, 615-623.

Application References

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Companion Products

For Research Use Only. Not For Use In Diagnostic Procedures.

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