the helper factor contained in wehi-3 conditioned media responsible for the above biological activity has an apparent mol . wt . of approximately 40 000 as determined by sephadex g-100 chromatography and lacks il 1 and il 2 activities , but efficiently supports the growth of il 2-producer cells derived from nude mice and the peripheral blood of normal human volunteers .
C0021756
il 2
C0086418
human