The Extracellular Nature of Enamel in the Rat | Zendy

Michael L. Watson | Zendy

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The Extracellular Nature of Enamel in the Rat

Author(s) -

Michael L. Watson

Publication year - 1960

Publication title -

the journal of cell biology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 5.414

H-Index - 380

eISSN - 1540-8140

pISSN - 0021-9525

DOI - 10.1083/jcb.7.3.489

Subject(s) - ameloblast , enamel paint , extracellular , extracellular matrix , electron microscope , amelogenesis , biology , biophysics , staining , microbiology and biotechnology , intracellular , anatomy , materials science , optics , composite material , physics , genetics

Developing incisal enamel of the rat has been examined in sections with the electron microscope. Staining the sections with heavy metal and sandwiching them has revealed details hitherto unvisualized because of low contrast and destruction by the electron beam. In particular, it is seen that the cell membrane always lies between the ameloblast and the enamel and therefore that enamel is extracellular and not intracellular. Implications of this with regard to the possible keratinous nature of enamel matrix are discussed.

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