Anti-Human CD307e (FcRL5) - PE

FcRL5 antibody, 509F6, recognizes Fc receptor-like 5 (FcRL5), also known as immunoglobulin superfamily receptor translocation associated 2 (IRTA2), Fc receptor homolog 5 (FcRH5), and BXMAS1. FcRL5 is a 106 kDa type I transmembrane glycoprotein containing 9 Ig-like extracellular domains, a cytoplasmic ITAM-like consensus sequence, and two cytoplasmic ITIM-like sequences1. FcRL5 is found on most mature B cells, with the highest levels on naive and memory B cells and plasma cells1,2. FcRL5 is an IgG receptor and binds to all IgG isotypes3, resulting in the inhibition of BCR signaling through the recruitment of SH2 domain-containing tyrosine phosphatase 1 (SHP-1) after tyrosine phosphorylation of its two ITIMs4. B cell malignancies, including multiple myeloma, chronic lymphocytic leukemia, mantle cell lymphoma, and hairy cell leukemia, often exhibit aberrant FCRL5 expression, indicating FcRL5 as a potential biomarker or therapeutic target5-7.