on the basis of evidence that lysosomal enzymes and membrane proteins are present in endosomes , we have previously suggested that the production of lysosomes involves maturation rather than vesicle fusion ( roederer , m. , r. bowser , r. f. murphy , j. cell . physiol . 131 , 200-209 ( 1987 ) ) .
C0034850
endosomes
C0007634
cell