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XBP1, NT (X-box-binding Protein 1, XBP-1, Tax-responsive Element-binding Protein 5, TREB5, XBP2)

Cat no: X0989-51L


Supplier: United States Biological
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X box binding protein 1 (XBP-1) is a key protein in the mammalian unfolded protein response (UPR) that protects the cell against the stress of malfolded proteins in the endoplasmic reticulum (ER). Upon sensing unfolded proteins, an ER transmembrane endonuclease and kinase termed IRE1p is activated and excises an intron from XBP-1 mRNA. The spliced XBP-1 mRNA results in a 371aa protein (XBP-1s) which is then translocated to the nucleus where it binds to the regulatory elements of downstream genes. Together with other UPR transcription factors such as ATF6, XBP-1 stimulates the production of ER stress proteins including the ER resident protein chaperones glucose regulated protein (GRP) 78 and GRP94. Applications: Suitable for use in ELISA, Western Blot and Immunocytochemistry. Other applications not tested. Recommended Dilution: Western Blot: 1-2ug/ml Optimal dilutions to be determined by the researcher. Positive Control: L1210 cell lysate Storage and Stability: May be stored at 4 degrees C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20 degrees C. Aliquots are stable for at least 12 months. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.
Catalogue number: X0989-51L
Reactivities: Human, Mouse
Hosts: Rabbit
Applications: ELISA, Immunocytochemistry, Western Blot
Size: 50ug
Form: Supplied as a liquid in PBS, 0.02% sodium azide.
P type: Pab
Isotype: IgG
Purity: Purified
References: 1. Yoshida H, et al (2001) Cell. 107:881-91. 2. Calfon M, et al (2002) Nature. 415:92-6. 3. Haze K, et al (1999) Mol. Cell. Biol. 1999; 10:3787-99. 4. Little E, et al (1994) Crit. Rev. Eukaryot. Gene Expr. 4:1-18.
Additional info: Recognizes human XBP-1. Species Crossreactivity: mouse.

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