a variant tumor ( moc-315 nr ) was grown from the small proportion of mopc-315 cells ( 5-10 % ) that did not bind tnp-erythrocytes directly : this tumor secreted only the light chain of protein 315 , carried this chain on the cell surface , and resembled the variant tumors that arose , probably by immunoselection , in balb/c mice challenged with mopc-315 cells while making an immune response to the idiotype of protein 315 .
C1327616
secreted
C0007634
cells