new melanogenesis was manifested by 4 stages of cellular and subcellular reactions of these cells as indicated by histochemistry of dihydroxyphenylalanine ( dopa ) and autoradiography of thymidine incorporation : ( a ) an initial lag in the activation of precursor melanocytes with development of golgi cisternae and rough endoplasmic reticulum followed by formation of unmelanized melanosomes ( day 0 to 2 ) ;
C0007634
cells
C0230779
rough endoplasmic reticulum