purified interleukin 2 ( il-2 ) , obtained by the recombinant dna technology ( r-il-2 ) , enhanced the proliferative response of anti-mu-stimulated human b cells in the costimulation assay with anti-mu antibody and maintained the b-cell proliferation induced by preactivation with sac bacteria .
C0021756
il-2
C1155008
b-cell proliferation