Fig. 4. Uptake rates of the amino acids L-leucine and L-proline and of the sugar D-glucose by the anterior (A) and distal (D) portions of the small intestine of fasted (following a 30-day fast, open bars) and fed (2 days postfeeding, solid bars) Python brongersmai, P. molurus, P. regius, P. reticulatus and P. sebae. All species (with the exception of P. brongersmai for L-leucine and L-proline) showed significant postprandial increases in nutrient uptake by the anterior small intestine and in many cases by the distal intestine. ^*P<0.05, ^**P<0.01, ^***P<0.001.