FIG. 5.

Kinetics of glycine uptake by mouse kidney BBMV preparations. The conditions were the same as in Fig. 3 except that different concentrations of unlabeled glycine were added to the uptake mixture. The reaction was terminated after 30 s, and the residual radioactivity inside the vesicles was taken as the initial velocity of glycine uptake. (A) [³H]glycine uptake was plotted against the concentrations of unlabeled glycine added; (B) the initial velocity of glycine uptake was plotted against the ratio of glycine uptake velocity and the total concentrations of glycine.