表位是抗原分子中由特殊的化学基团组成的结构,根据与抗原受体结合的不同可分为B细胞表位和T细胞表位。B细胞表位是抗原中可被B细胞抗原受体或抗体特异性识别并结合的线性片段或空间构象性结构。B细胞表位只有很少的一部分是线性表位,而绝大部分(约90%)是构象性表位。定位构象 Epitopes are structures of antigen molecules composed of special chemical groups. They can be divided into B-cell epitopes and T-cell epitopes according to their binding to antigen receptors. B cell epitopes are linear segments or steric conformational structures in an antigen that are specifically recognized and bound by B-cell antigen receptors or antibodies. Only a small part of the B cell epitopes are linear epitopes, while the vast majority (about 90%) are conformational epitopes. Location conformation