Homo sapiens Fc fragment of IgG, low affinity IIb, receptor (CD32) (FCGR2B), transcript variant 4
Synonyms:
CD32; CD32B; FCG2; FCGR2; IGFR2
Immunogen
A phospho specific peptide corresponding to residues surrounding tyrosine 292 of human Fc gamma RIIb. This antibody detects Fc gamma RIIb phosphorylated on tyrosine 292.
Buffer
50 mM Tris-Glycine (pH 7.4), 0.15 M NaCl, 40% Glycerol, 0.01% sodium azide and 0.05% BSA.
Low affinity IgG Fc receptor gamma II (Fc-gamma II), also known as CD32, is a member of the immunoreceptor tyrosine-based activating/inhibitory motif (ITAM/ITIM) family. Fc gamma receptors play a critical role in immunity by linking the IgG antibody mediated response with the regulatory functions of the immune system (1). Three classes of Fc gamma receptor exist; Fc gamma RI (CD64, a high affinity receptor), Fc gamma RII, and RIII (CD32 and CD16 respectively, both low affinity receptors). Fc gamma RIIa is an activating receptor, while RIIb1, RIIb2, and RIIb3 are inhibitory receptors generated by alternative splicing (1-2). Fc gamma RIIa is critical for antigen-presenting-cell activation and Fc gamma RIIb downregulates B-cell functions (3). Coligation of FcgammaRIIb with the B-cell antigen receptor (BCR) results in the abrogation of B-cell activation and become phosphorlyated by protein tyrosine kinase (PTK) (4)
Related Pathway
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Western blot analysis on Daudi cell lysates using anti-Phospho-Fc gamma RIIb (py292), 1:100,000 dilution. Cells were either (A) untreated (B) treated with pervanadate.
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