igf i ( 25 ng/ml ) stimulated clonal growth of fetal chondrocytes ( 54 +/- 12 colonies/1,000 inserted cells , mean +/- 1 sd ) , but igf ii ( 25 ng/ml ) was significantly more effective ( 106 +/- 12 colonies/1,000 inserted cells , p less than 0.05 , unstimulated control : 14 +/- 4 colonies/1,000 inserted cells ) .
C0225369
chondrocytes
C0007634
cells