抗原 こうげん抗体 こうたい反応 はんのうであれば
kōgenkōtaihannōdeareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of 抗原抗体反応

1. If there is an antigen-antibody reaction; When there is an antigen-antibody reaction

Ba Conditional