Fig. 1. (A) Plasma glucose concentrations (mmol l1). (B) Urine
glucose concentrations (mmol l1). Values are means ±
1 S.E.M. (N=7). * indicates a
significant difference (P<0.05) between the indicated value and
the previous 12 h value; a indicates a significant difference
(P<0.05) between the indicated value and the glucose-only infusion
value at the same time point.