Figure 1.

Graph showing the time courses of plasma Glc C-1 fractional enrichment with ¹³C for group A (•), group B (⧫), and group C (▴). Each point represents the mean for the group and the error bars give ±SD. In group A, the total plasma Glc ¹³C fractional enrichment was taken to be twice the fractional enrichment measured at C-1 because [1,6-¹³C]Glc had been infused.