XBP1s Polyclonal Antibody

Sizes: 60μL, 120μL, 200μL

Catalogue Numbers: E-AB-93195-60, E-AB-93195-120, E-AB-93195-200

Citations, Manuals and MSDS Available upon request.

Abbreviation: XBP1s

Target Synonym: XBP1; TREB-5; TREB5; XBP-1; XBP2; XBP1s; CBX1

Research Areas: Cancer, Epigenetics and Nuclear Signaling

Conjugation: Unconjugated

Host: Rabbit

Species Reactivity: Human, Mouse, Rat

Application: WB, IHC

Isotype: IgG

Clonality: Polyclonal

UNIProt ID: P17861

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.

Concentration: 1mg/mL

Immunogen: A synthetic peptide of human XBP1s

Buffer: PBS with 0.02% sodium azide, 50% glycerol, pH7.3.

Purification Method: Affinity purification

Dilution: WB 1:500-1:2000, IHC 1:50-1:200

Calculated MW: 28kDa/40kDa

Observed MW: 28kDa/50kDa

Storage: -20°C/One year. Avoid freeze / thaw cycles.

Shipping: Ice bag

Research Use Only