however , the lea-active oligosaccharide hapten , lacto-n-fucopentaose ii , with the same carbohydrate structure , fails to inhibit binding of 43-9f , and a well-characterized anti-lea monoclonal antibody blocks only 40 % of 43-9f binding sites on slc cells , suggesting that the major epitope recognized by 43-9f is more complex than the lea epitope .
C0018593
hapten
C0003316
epitope