When their essential biological function as antigen-binding molecules and informers for T cells was unveiled, an explanation of why MHC also acts as major histocompatibility antigens was provided.

• 随着其抗原结合分子及T细胞信使生物学功能本质的揭示,MHC为什么是主要组织相容性抗原的谜底就昭然于世。