throughout the zones of presecretion , secretion , and maturation of enamel , specific protein a-immunogold labeling was localized on polyribosomes and those attached to endoplasmic reticulum , mitochondria , nuclear chromatin , phagolysosomes , and cytoplasm adjacent to the plasma membrane , and tonofilaments associated with desmosomes of ameloblasts and cells of outer layer of enamel organ .
C0014239
endoplasmic reticulum
C0007634
cells