natural human interleukin 1 and recombinant interleukin 1 beta , but not interleukin 1 alpha , suppressed in a dose dependent manner the proliferation of the human erythroleukaemia cell line ( hel ) in cultures , suggesting that the interleukin 1 effect is a direct one .
C0021753
recombinant interleukin 1 beta
C0021755
interleukin 1