type beta transforming growth factor/growth inhibitor ( tgf-beta/gi ) is demonstrated to be a potent stimulator of dna synthesis in akr-2b mouse embryo cells with a prolonged ( greater than 24 hr ) prereplicative phase when compared with other growth factors ( epidermal growth factor , platelet-derived growth factor , or fibroblast growth factor ) that induce dna synthesis 12-14 hr after stimulation .
C0018284
growth factors
C0032200
platelet-derived growth