Fig. 3.
Dose response of Vin-stimulated Pgp ATPase activity of Pgp overexpressing membranes in P85-free (filled diamonds), 0.01% P85 (empty squares), and 0.1% P85 solution (empty triangles). Incubation t = 20 min, [Mg2+ATP] = 4 mM. Each point shows the mean of triplicate experiments ± SD.