抗原決定簇 [ㄎㄤˋ ㄩㄢˊ ㄐㄩㄝˊ ㄉㄧㄥˋ ㄘㄨˋ; kang4 yuan2 jue2 ding4 cu4] antigen determinant (causing immunological response) epitope ◄ ►