the high relative potency of insulin together with the effects of proinsulin ( less than 15 % ) and desoctapeptide insulin ( less than 10 % ) compared to insulin on the chick embryo , led us to infer that at low doses ( nanograms per embryo ) insulin stimulates developmental processes mainly through the insulin receptor , with the possible exception of muscle differentiation .
C0033362
proinsulin
C0021641
insulin