multiplication stimulating activity ( msa ) , an insulin-like growth factor , was about 100-fold more potent than insulin : 3 ng/ml msa stimulated a half-maximal increase in thymidine labeling of beta-cell ( +63 % , p less than 0.005 ) , whereas 300 ng/ml insulin was required for a similar effect .
C0037657
insulin-like
C0021666
msa