passages.id: split_5_test_3604_passage
passages.type: progene_text
passages.text: The KIRs of the p58 / p50 family have two immunoglobulin domains and are ligands for HLA-Cw antigens , whereas the p70 / p70 delta family has three immunoglobulin domains and comprises ligands for HLA-B antigens and possibly some HLA-A antigens .