showed a trendP = 0.052
Duodenal expression of the apical sodium dependent P transporters, NaPi-IIb, PiT-2 and the candidate basolateral P extrusion channel, xenotropic and polytropic retrovirus receptor 1 ( XPR1 ), were either significantly reduced or showed a trend with incremental dietary Ca/rP in a linear fashion (14, 8 and 23% reduction; P = 0.052, 0.071, and 0.028, respectively).