lak-mediated cytotoxicity , induced with a combination of human recombinant il-2 ( cetus , 100 u/ml ) and tnf ( genentech , 500 u/ml ) , showed a mean fourfold increase ( range 0.7-16.3 ) over il-2 alone .
C0218986
human recombinant il-2
C0021756
il-2