a clear difference in the specificity of il-hp1 and b cell stimulatory factor 1 ( bsf-1 ) was demonstrated by the finding that il-hp1-dependent plasmacytomas did not survive in the presence of bsf-1 , whereas helper t cell lines that proliferated in the presence of bsf-1 failed to respond to il-hp1 .
C0021758
bsf-1
C0021764
il-hp1