Western Blot analysis of immunized recombinant protein using XBP1 antibody (10R-1263)
XBP1 antibody
Western Blot analysis of immunized recombinant protein using XBP1 antibody (10R-1263)
Specifications
Host
Mouse
Clone
XBP1H6E5
Isotype
IgG1
Method of Purification
XBP1 antibody was purified using protein G column chromatography from culture supernatant of hybridoma
cultured in a medium containing bovine IgG-depleted
(approximately 95%) fetal bovine serum.
Form & Buffer
XBP1 antibody in PBS (3.0 mM KCl, 1.5 mM KH2 PO4 , 140 mM NaCl, 8.0 mM Na2 HPO4 (pH 7.4)) containing 1% bovine serum albumin (BSA) and 0.05% sodium azide (NaN3 ).
Store at 2-8 deg C for up to one year. We recommend long term storage at -20 deg C. Avoid repeated freezing and thawing.
Biohazard Information
This antibody solution contains sodium azide (NaN )
as a preservative. There is a potential hazard that
NaN reacts with copper or lead to produce an explosive
compound. For safe disposal, the vial has to
be washed thoroughly with water. It is strongly adv
General Information
Biological Significance
This gene encodes a transcription factor that regulates MHC class II genes by binding to a promoter element referred to as an X box. This gene product is a bZIP protein, which was also identified as a cellular transcription factor that binds to an enhancer in the promoter of the T cell leukemia virus type 1 promoter. It may increase expression of viral proteins by acting as the DNA binding partner of a viral transactivator. It has been found that upon accumulation of unfolded proteins in the endoplasmic reticulum (ER), the mRNA of this gene is processed to an active form by an unconventional splicing mechanism that is mediated by the endonuclease inositol-requiring enzyme 1 (IRE1). The resulting loss of 26 nt from the spliced mRNA causes a frame-shift and an isoform XBP1(S), which is the functionally active transcription factor. The isoform encoded by the unspliced mRNA, XBP1(U), is constitutively expressed, and thought to function as a negative feedback regulator of XBP1(S), which shuts off transcription of target genes during the recovery phase of ER stress. A pseudogene of XBP1 has been identified and localized to chromosome 5.