2JJS, 2JJT, 2UV3, 2WNG, 4CMM14088519261ENSG00000198053ENSMUSG00000037902P78324P97797NM_001040022NM_001040023NM_080792NM_001330728NM_001291022NM_007547NM_001355158NM_001355160NP_001035111NP_001035112NP_001317657NP_542970NP_031573NP_001342087NP_001342089Signal regulatory protein α (SIRPα) is a regulatory membrane glycoprotein from SIRP family expressed mainly by myeloid cells and also by stem cells or neurons.