"IAP domains" . . . "BIRs" . . "Baculovirus Inhibitor of apoptosis protein Repeat" . "BIR" . . . . . . "BIR domain" . "Inhibitor of apoptosis domain" . . . . . "baculoviral IAP repeat" . "Inhibitor of apoptosis domain" . . "baculovirus inhibitor repeats" . "BIR" .