although complementary dna ( cdna ) encoding human interleukin 1 beta ( il 1 beta ) have been cloned in several laboratories , there are as yet no data demonstrating that recombinant il 1 beta ( ril 1 beta ) molecules expressed from such cdna are faithful , fully active replicas of the native protein secreted by human monocytes .
C1335621
ril
C0086418
human