Product Description

XBP1 Polyclonal Antibody

Product: 1mg/ml in PBS with 0.02% sodium azide, 50% glycerol, pH7.2

Sizes: 50 µl, 100 µl

Catalogue Numbers: BS70247-50, BS70247-100

Swiss-Prot: P17861

Host: Rabbit

XBP1 Polyclonal Antibody-BS70247

Storage and Stability: Store at 4°C short term. Aliquot and store at -20°C long term. Avoid freeze-thaw cycles.

Reactivity: Human, Mouse, Rat

Applications: WB,

All Applications: WB,1:500 - 1:2000

Background: 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.

Purification and Purity: The antibody was affinity-purified from rabbit antiserum by affinity-chromatography using epitope-specific immunogen and the purity is > 95% (by SDS-PAGE).

Specificity: Polyclonal Antibodies

Bioworld Molecular Weight: 35kDa/55kDa/60KDa

Note: For research use only, not for use in diagnostic procedure.

Extra Notes: Western blot analysis of extracts of various cell lines, using XBP1 antibody at 1:1000 dilution.
Secondary antibody: HRP Goat Anti-Rabbit IgG at 1:10000 dilution.
Lysates/proteins: 25ug per lane.
Blocking buffer: 3% non-fat dry milk in TBST.
Detection: ECL Basic Kit.
Exposure time: 5s., Western blot analysis of extracts of 293T cells, using XBP1 antibody at 1:1000 dilution.293T cells were treated by tunicamycin for 8 hours.
Secondary antibody: HRP Goat Anti-Rabbit IgG at 1:10000 dilution.
Lysates/proteins: 25ug per lane.
Blocking buffer: 3% BSA.
Detection: ECL Basic Kit.
Exposure time: 10s.

Alternative Name: XBP1; TREB-5; TREB5; XBP-1; XBP2; XBP1s; CBX1

Immunogen: A synthetic peptide of human XBP1(NP_001073007.1).

Modification: Unmodified

Conjugate: Unconjugated