结构相似的不同抗原之间竞争性调节 Antigen recognition T cell response APC Peptide-specifio naive T cell Proliferation and differentiation Native Restimulation Altered peptide Failure to respond with native peptide ligand(APL) to native peptide (anergy)结构相似的不同抗原之间竞争性调节 结构相似的不同抗原之间竞争性调节