Autophagosome-lysosome fision measured by means o f electroinjected [ ‘“C] lactose While [‘“C] sucrose is an inert sequestration probe which eventually accumulates in lysosomes, [‘“c] lactose is hydrolysed immediately upon entry into the lysosome, by the lysosomal enzyme 0-galactosidase. Autophagically sequestered [“C] lactose therefore rapidly equilibrates at a low steady-state level, probably...
