PercP-Cy5.5 Mouse Anti-Rat CD4 Antibody (S-R631)

產(chǎn)品型號(hào)：S0B5460

更新時(shí)間：2025-08-08

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產(chǎn)品介紹

CD4 is a glycoprotein expressed on the surface of certain immune cells, most notably helper T cells. It is a member of the immunoglobulin superfamily and has four immunoglobulin-like domains （D1 to D4）. CD4 acts as a co-receptor with the T-cell receptor （TCR） to recognize antigens displayed by MHC class II molecules on antigen-presenting cells. The D1 domain of CD4 binds to the β2 region of MHC class II, bringing the TCR complex and CD4 into close proximity. This allows the tyrosine kinase Lck, bound to the cytoplasmic tail of CD4, to phosphorylate tyrosine residues on the cytoplasmic domains of CD3, amplifying the signal generated by the TCR. CD4 is also the primary receptor for the human immunodeficiency virus （HIV）, and its interaction with the HIV gp120 protein is a key step in viral entry.

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