cultures of lac-primed b cells and keyhole limpet hemocyanin ( klh ) -specific t cells were activated in three ways : ( a ) by the antigen lac-klh , ( b ) in the absence of lac epitopes by attaching klh to the h-2 antigens of the b cells , and ( c ) in similar conditions where lac epitopes were supplied on carriers unrecognized by helper t cells .
C0003320
antigen
C0003316
epitopes