insulin ( 2 x 10 ( -6 ) m ) , igf-i ( 1 x 10 ( -8 ) m ) , and pdgf ( 1 x 10 ( -9 ) m ) cause a 60-80 % increase in cell numbers over basal , but pdgf with insulin or igf causes a 40-150 % increase over basal .
C0021665
igf-i
C0037657
igf