V_i interaction with nucleotides in the trapping of Pgp.

<p>(A) Semi-log plot of the V_i concentration dependence of the trapped enzyme fraction with 1000 µM ATP (blue symbols) or 1000 µM ADP (red symbols), from the evaluation of with and , respectively. (B) Semi-log plot of the nucleotide dependence of the fraction of free enzyme, with 200 µM V_i and either ATP (blue symbols) or ADP (red symbols), evaluating with and , respectively. Lines are the best fits to the Hill equation with <i>n</i> = 1. Values of <b>k</b> are given in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0098804#pone-0098804-t002" target="_blank"><b>Table 2</b></a>.