1.   Similarly, infusion of PYX did not prevent bile inhibition of ileal motor activity.

2.   This suggested that bile inhibition of ileal motor activity was mediated by a humoral agent from the terminal ileum present in the venous effluent.

3.   We therefore suggested that PYY might mediate the bile inhibition of ileal motility.

4.   Furthermore, preinfusion of PYX, a specific competitive antagonist of PYY, did not reduce bile inhibition of ileal motor activity.

5.   Other regulatory peptides in the terminal ileum may mediate bile inhibition of ileal motility.