Figure 1.

(A and B) In vivo uptake of phosphate by the duodenum (A) and jejunum (B) in rats infused with HEPES (□) or 1 mg/kg per h MEPE (▪) or 3 mg/kg per h MEPE (▴) for 3 h. Data are means ± SEM of six experiments per region, as a percentage of the initial counts transferred from 5 cm of small intestine into 1 ml of blood. *P < 0.05 and **P < 0.01 compared with HEPES control using an ANOVA with post hoc comparisons performed using the Bonferroni multiple comparisons test.