(B) Effect of MBCD on total rates of protein degradation, measured as in (A), in wild‐type mouse fibroblasts and in fibroblasts stably RNA interfered for LAMP‐2A (LAMP‐2A(−)). The ratio of degradation in MBCD‐treated and untreated cells is shown for cells maintained with or without 10 mM 3‐methyladenine (3MA). 