Here are recombinant proteins for SIRPB1, the approved symbol for the human gene, 'signal regulatory protein beta 1'. With a Uniprot ID of O00241, this protein is listed as having 398 residues in length and a mass of 43.3 kDa. Up to 3 isoforms are reported. The following protein function has been assigned: 'Immunoglobulin-like cell surface receptor involved in the negative regulation of receptor tyrosine kinase-coupled signaling processes.' Orthologs are reported in these species: mouse, rat. SIRPB1 may also be known by other designations: 'signal-regulatory protein beta-1, CD172 antigen-like family member B'.