CD74 Monoclonal / FITC / 5-329

Product Details
Description Clone 5-329 recognizes CD74, a non-polymorphic type II integral membrane protein. CD74 is also known as MHC class II–associated invariant chain and exists in multiple isoforms in human ranging from 33 to 43 kDa in size. Initially known for its role as the MHC II chaperone, CD74 primary function is suggested to regulate the MHC class II molecules folding and intracellular sorting. Recent studies however suggest further roles of CD74. It interacts with cytokine-like molecule called macrophage migration- inhibitory factor (MIF) and induce ERK1 and ERK2 signaling in a CD44 dependent manner. CD74 is also shown to form complexes with CXCR2 and CXCR4. A direct role of CD74 in the maturation of follicular B cells and accumulation of marginal zone B cells has also been suggested. CD74 was further shown to be one of the host molecules utilized by H. pylori to successfully attach to the gastric epithelial cells. Expression of CD74 is found on B cells, dendritic cells, epithelial cells, subsets of activated T cells, and low level expression is found on monocytes and macrophages.
Conjugate FITC
Clone 5-329
Target Species Human
Applications FC, MICS (MACSima Imaging Cyclic Staining), IF, IHC
Supplier Miltenyi Biotec
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About CD74
The protein encoded by this gene associates with class II major histocompatibility complex (MHC) and is an important chaperone that regulates antigen presentation for immune response. It also serves as cell surface receptor for the cytokine macrophage migration inhibitory factor (MIF) which, when bound to the encoded protein, initiates survival pathways and cell proliferation. This protein also interacts with amyloid precursor protein (APP) and suppresses the production of amyloid beta (Abeta). Multiple alternatively spliced transcript variants encoding different isoforms have been identified. [provided by RefSeq, Aug 2011]
About FITC
Fluorescein isothiocyanate (FITC) has an excitation peak at 495 nm and an emission peak at 519 nm. The name FITC is a misnomer in that the isothiocyanate is a reactive form of this dye. Once FITC is conjugated to an antibody, it is simply Fluorescein conjugated. FITC is one of the most widely used dyes for fluorescent applications, therefore most instruments come standard with a 488 nm laser and FITC filter set up. FITC is commonly conjugated to secondary antibodies and used in applications such as flow cytometry, immunocytochemistry, and immunohistochemistry. FITC is relatively dim, sensitive to photobleaching and it is susceptible to changes is pH. There are better performing alternatives to FITC, like Vio®Bright 515, Alexa Fluor™ 488, iFluor® 488, CF®488A and DY-488. FITC is a long-time generic dye with no sole manufacturer or trademark.
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Validation References
PMID 12782713
PMID 19533806
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