Fig. 7. Uptake rate of L-leucine (A), L-proline (B) and D-glucose (C) of the proximal, middle and distal portions of the small intestine of fasted and fed Heloderma suspectum. For details of meal treatments, see Fig. 2. Values are means ±1 s.e.m., N=3 for each fasted and fed treatment. Different letters above the bars denote significant differences between means (see text for P values). There was no detectable uptake of D-glucose for the distal small intestine of fasted lizards; therefore, no bar is shown. Lizards experienced no significant postprandial increase in L-leucine and L-proline uptake, whereas D-glucose uptake increased significantly with feeding in the proximal and middle small intestine.