MPP1 and erythroleukemia: To assess the functional role of MPP1 in membrane dynamics, we used a stable, lentiviraly transduced, MPP1 knock-down human erythroleukemia cell line (MPP1 KnD) along with control cells: wild-type HEL (WT, control) and HEL transduced with scrambled shRNA (SC) (Supplementary Figure 1A).