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XBP1S-specific Polyclonal antibody

XBP1S-specific Polyclonal Antibody for IHC, WB, ELISA

Host / Isotype

Rabbit / IgG


human, mouse, rat





Cat no : 24868-1-AP


TREB5, X box binding protein 1, XBP 1, XBP1, XBP1S, XBP1S-specific, XBP2

Tested Applications

Positive WB detected inHEK-293T cells, MCF-7 cells, mouse liver tissue, rat liver tissue
Positive IHC detected inhuman breast cancer tissue, human colon cancer tissue, human liver cancer tissue, mouse liver tissue
Note: suggested antigen retrieval with TE buffer pH 9.0; (*) Alternatively, antigen retrieval may be performed with citrate buffer pH 6.0

Recommended dilution

Western Blot (WB)WB : 1:1000-1:6000
Immunohistochemistry (IHC)IHC : 1:50-1:500
Sample-dependent, check data in validation data gallery

Product Information

24868-1-AP targets XBP1S-specific in WB, IHC, IF, ELISA applications and shows reactivity with human, mouse, rat samples.

Tested Reactivity human, mouse, rat
Cited Reactivityhuman, mouse, rat
Host / Isotype Rabbit / IgG
Class Polyclonal
Type Antibody
Immunogen XBP1S-specific fusion protein Ag21703
Full Name X-box binding protein 1
Calculated molecular weight 261 aa, 29 kDa
Observed molecular weight 55 kDa
GenBank accession numberBC000938
Gene symbol XBP1
Gene ID (NCBI) 7494
Conjugate Unconjugated
Form Liquid
Purification Method Antigen affinity purification
Storage Buffer PBS with 0.02% sodium azide and 50% glycerol pH 7.3.
Storage ConditionsStore at -20°C. Stable for one year after shipment. Aliquoting is unnecessary for -20oC storage. 20ul sizes contain 0.1% BSA.

Background Information

XBP1, also named as XBP2, belongs to the bZIP family. The X-box-binding protein-1 (XBP1) is a transcriptional regulator of the ER stress response that lies downstream of inositol-requiring enzyme 1 (IRE1α) activation (PMID: 14559994). XBP1 localizes in the nucleus. As a transcription factor, it is essential for hepatocyte growth, the differentiation of plasma cells, the immunoglobulin secretion, and the unfolded protein response. XBP1 has an association with major affective disorder. The unspliced XBP1U isoform is composed of 261 amino acid residues, and the spliced XBP1S isoform is composed of 376 amino acid residues. The calculated molecular weight of protein generated from the unspliced XBP1 isoform XBP1U mRNA is 33 kDa, and protein generated from spliced XBP1 isoform XBP1S mRNA is 54 kDa. This antibody specially recognizes the XBP1S isoform.


Product Specific Protocols
WB protocol for XBP1S-specific antibody 24868-1-APDownload protocol
IHC protocol for XBP1S-specific antibody 24868-1-APDownload protocol
Standard Protocols
Click here to view our Standard Protocols



Nat Commun

Activation of GCN2/ATF4 signals in amygdalar PKC-δ neurons promotes WAT browning under leucine deprivation.

Authors - Feixiang Yuan


Lipid Droplets Protect Human β-Cells From Lipotoxicity-Induced Stress and Cell Identity Changes.

Authors - Xin Tong

J Cell Physiol

Endoplasmic reticulum stress promotes sepsis-induced muscle atrophy via activation of STAT3 and Smad3

Authors - Yingfang Zheng

Cell Mol Life Sci

Neuronal microRNAs safeguard ER Ca2+ homeostasis and attenuate the unfolded protein response upon stress.

Authors - Maria Paschou

Front Cell Dev Biol

Obesity impacts placental function through activation of p-IRE1a-XBP1s signaling

Authors - Wei-Bin Shen

Transl Stroke Res

Melatonin Offers Dual-Phase Protection to Brain Vessel Endothelial Cells in Prolonged Cerebral Ischemia-Recanalization Through Ameliorating ER Stress and Resolving Refractory Stress Granule

Authors - Danli Lu


The reviews below have been submitted by verified Proteintech customers who received an incentive forproviding their feedback.


Kevin (Verified Customer) (08-19-2019)

Good antibody. Clear and sharp bands on liver tissue from mouse.

  • Applications: Western Blot,
  • Primary Antibody Dilution: 1:1000
  • Cell Tissue Type: Mouse liver tissue