the second phase was characterized by a round but heterochromatical nucleus containing also a heterochromatic nucleolus , and the appearance of receptosome- ( endosome , endocytotic vesicle ) and lysosome-like structures near to the cytoplasmic membrane of the basal cell portion , as well as in the basal and lateral perinuclear region ( early heterochromatic phase ) .
C0007610
nucleus
C0007609
nucleolus