when pdgf or sm-c was added individually to smooth muscle cell cultures , each growth factor induced only minimal increases in [ 3h ] thymidine incorporation into dna ( i.e . pdgf , 3,400 +/- 1,120 to 54,900 +/- 1,550 cpm ; sm-c , 3,400 +/- 1,120 to 10,950 +/- 980 cpm ) .
C0018284
growth factor
C0032200
pdgf