XBP-1 / Janelia Fluor 549 /

Product Details
Supplier Novus Biologicals, a Bio-Techne brand
Catalog #: NBP1-77681JF549 (View supplier product page)
Size 0.1 ml
Price $499.00
Antigen XBP-1
Clone
Host Rabbit
Isotype IgG
Conjugate Janelia Fluor 549
Target Species Human, Mouse
Applications IHC, ICC/IF, IHC-P
Description This antibody is specific for both XBP1s and XBP1u.
About XBP-1 and Janelia Fluor 549
XBP-1 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. [provided by RefSeq, Jul 2008]
Janelia Fluor 549 Janelia Fluor® 549 was developed at the Janelia Campus of the Howard Hughes Medical Institute but is commercialized by other vendors. The Janelia Fluor®s family is unique in that the fluorophores are cell-permeable and are available in photoactivatable forms. These fluorophores were developed for super-resolution microscopy (STED, PALM and STORM) and live-cell microscopy in the HaloTag and SNAP-tag versions. Janelia Fluor® 549 has an excitation peak at 549 nm and an emission peak at 571 nm.
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Janelia Fluor 549 Excitation and Emission Spectra