Effect of P85 (conc. reported as % wt) on uptake of HRP in MDCK cells: (A) cellular levels of HRP as determined by enzymatic activity in cell lyzates, cells were treated in the absence or presence of P85 and are grouped as 1-HRP alone, 2-0.001% wt P85, 3-0.01% P85, 4-0.1% P85, 5-1% P85, 6- 2DG and sodium azide; (B) live cell confocal microscopy using RITC-HRP. (A) Data are mean +/− S.E.M. (n = 3).