The protein encoded by this gene is a member of the signal-regulatory protein (SIRP) family, and also belongs to the immunoglobulin superfamily. SIRP family members are receptor-type transmembrane glycoproteins known to be involved in the negative regulation of receptor tyrosine kinase-coupled signaling processes. Alternatively spliced transcript variants encoding different isoforms have been described.
^Ichigotani Y, Matsuda S, Machida K, Oshima K, Iwamoto T, Yamaki K, Hayakawa T, Hamaguchi M (Jan 2001). "Molecular cloning of a novel human gene (SIRP-B2) which encodes a new member of the SIRP/SHPS-1 protein family". J Hum Genet45 (6): 378–82. doi:10.1007/s100380070013. PMID11185750.
^van den Berg TK, van Beek EM, Buhring HJ, Colonna M, Hamaguchi M, Howard CJ, Kasuga M, Liu Y, Matozaki T, Neel BG, Parkos CA, Sano S, Vignery A, Vivier E, Wright M, Zawatzky R, Barclay AN (Dec 2005). "A nomenclature for signal regulatory protein family members". J Immunol175 (12): 7788–9. doi:10.4049/jimmunol.175.12.7788. PMID16339511.
Brooke G, Holbrook JD, Brown MH, Barclay AN (2004). "Human lymphocytes interact directly with CD47 through a novel member of the signal regulatory protein (SIRP) family". J. Immunol.173 (4): 2562–70. doi:10.4049/jimmunol.173.4.2562. PMID15294972.
Piccio L, Vermi W, Boles KS, et al. (2006). "Adhesion of human T cells to antigen-presenting cells through SIRPbeta2-CD47 interaction costimulates T-cell proliferation". Blood105 (6): 2421–7. doi:10.1182/blood-2004-07-2823. PMID15383453.