after activation by anti-mu antibody human b cells acquire the ability to proliferate in the presence of recombinant interleukin 2 ( il 2 ) , a 20-kda mol . mass b cell growth factor ( bcgf ) and a high mol . mass bcgf ( 50-kda bcgf ) .
C0086418
human
C0021756
recombinant interleukin 2