(C) Proteolysis of [14C]GAPDH or a pool of [3H]labeled cytosolic proteins (pool proteins) by isolated rat liver lysosomes, treated or not with MBCD. Broken: lysosomes disrupted by a hypotonic shock before the incubation with the radiolabeled proteins. Values are expressed as percentage of the degradation by untreated lysosomes and are the mean+s.e. of three experiments with triplicate samples. 