Figure 1. Discordance for oral glucose tolerance and insulin sensitivity in monozygotic twins. A.

Plasma glucose 120 min after a 75-g oral glucose load in type 2 diabetic and non-diabetic twins (n = 12 pairs, P<0.001). B Glucose infusion rate during a euglycemic-hyperinsulinemic clamp in type 2 diabetic and non-diabetic twins (n = 9 pairs, P = 0.006). Data are presented as mean±standard error of the mean.