the mycobacterial 65-kda antigen and common antigen are similar in that both ( i ) are highly immunoreactive molecules , ( ii ) contain species-specific and genus-specific epitopes in addition to the broadly cross-reactive epitopes , ( iii ) can be isolated as homomultimers of greater than 240 kda , and ( iv ) have similar amino acid compositions .
C0003320
antigen
C0003316
epitopes