Product Profile

Product Name	Anti-XBP1 antibody
Antibody Type	Primary Antibodies
Immunogen	Polypeptide

Key Feature

Clonality	Polyclonal
Isotype	IgG
Host Species	Rabbit
Tested Application	ELISAICC/IFWB
	WB:1:200-1:2000 ICC/IF:1:100-1:500
Species Reactivity	HumanMouseRat
Concentration	1 mg/ml
Purification	Protein A

Target Information

Gene Symbol	XBP1
Gene Synonyms	XBP2 TREB5 XBP-1 TREB-5 Hide
Gene Full Name	X-box binding protein 1
Gene Summary	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. Hide
Molecular Weight(MW)	29 kDa（Observed:37 kDa）
Cellular Localizatio	Cytoplasm, Endoplasmic reticulum, Membrane, Nucleus

Application

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WB

Western blot analysis using XBP1 antibody against A549(1), HepG2(2) cell lysate.

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ICC/IF

Immunofluorescence analysis of T24 cells using XBP1 antibody (green). Blue: DAPI fluorescent DNA dye. Red: Actin filaments have been labeled with Alexa Fluor- 555 phalloidin.

Application Notes

WB:1:200-1:2000 ICC/IF:1:100-1:500

Additional Information

Form	Liquid
Storage Instruction	Shipped at 4°C. Store at +4°C short term (1-2 weeks). Store at -20°C long term. Avoid freeze / thaw cycle.
Storage Buffer	Purified antibody in PBS with 0.05% sodium azide.