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Tooth germs were examined by light and transmission electron microscopy. Collagen fibrils were relatively dispersed and thin at the early and middle stages of formation of the enameloid matrix, when the enameloid layer was thin. At the late stage, the fibrils became thicker, reaching nearly 30 nm...
Normal keratinocytes from epidermis and from buccal mucosa underwent dissimilar stages of differentiation in the same culture medium and responded differently to changes in the composition of the medium. Manifestations of these variations were examined in terms of the expression at the mRNA level...