ヒト しろ血球 けっきゅう抗原 こうげんであれば
hito shiro kekkyūkōgendeareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of ヒト白血球抗原

1. If it were a human leukocyte antigen; If it is a human leukocyte antigen

Ba Conditional