(F) Proteolysis of a pool of 3[H]labeled cytosolic proteins by intact (left) or disrupted (right) lysosomes isolated from untransfected mouse fibroblasts (none) or fibroblasts transfected with wild‐type (WT) or the indicated mutant forms of hLAMP‐2A. Values are the mean+s.e. of two experiments with triplicate samples. 