a search for such factors led to the finding that both platelet-derived epstein-barr-virus-inducing factor ( eif ) , alias human tgf beta 1 and porcine tgf beta , exhibited -- upon intracutaneous injection -- convertogenic efficacy in initiated nmri-mouse skin in vivo provided that their injection was combined with a single topical application of the non-convertogenic tumor promoter 12-o-retinolyphorbol-13-acetate ( rpa ) .
C0086418
human
C0080222
tgf beta 1