the most straightforward interpretation of these experiments is that t ( h ) cell recognition of b cell mhc determinants is required for the activation of lyb-5 ( - ) b cells but is not required for the activation of lyb-5 ( + ) b cells . to better understand why t ( h ) cell activation of one b cell subpopulation is genetically restricted , whereas activation of another subpopulation is not , the response of lyb-5 ( + ) and lyb-5 ( - ) b cells to the soluble activating factors present in concanavalin a-induced spleen cell supernates ( con a sn ) was examined .
C0004561
b cells
C1155003
cell activation