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To determine its origin we examined the ultrastructure of the inner dental epithelium (IDE), odontoblasts, enameloid, and dentin matrices of cichlid tooth buds at the stage of enameloid formation. \u00a9 Alan R. Liss, Inc.<\/jats:p><jats:p>Columnar IDE cells had apical and basal terminal webs and contained organelles associated with protein synthesis, including elongated secretory granules containing fibrillar material having cross\u2010striations with 60\u2010nm periodicity. The morphology of IDE secretory granules was typical of procollagen granules observed in a large variety of ectodermal and mesodermal cells synthesizing collagen. In contrast, the paucity of secretory granules within three odontoblast types indicates that these cells probably do not synthesize enameloid matrix. These observations are consistent with the idea that the bulk of the enameloid matrix is itself an ectodermal collagen synthesized and secreted by IDE cells.<\/jats:p>","DOI":"10.1002\/jmor.1051870204","type":"journal-article","created":{"date-parts":[[2005,2,24]],"date-time":"2005-02-24T17:17:02Z","timestamp":1109265422000},"page":"159-172","source":"Crossref","is-referenced-by-count":29,"title":["Ultrastructure of the dental epithelium and odontoblasts during enameloid matrix deposition in cichlid teeth"],"prefix":"10.1002","volume":"187","author":[{"given":"Kenneth","family":"Prostak","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ziedonis","family":"Skobe","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2005,2,6]]},"reference":[{"key":"e_1_2_1_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/0003-9969(75)90152-1"},{"key":"e_1_2_1_3_1","first-page":"205","article-title":"Tooth ontogeny in the upper jaw and tongue of the rainbow trout (Salmo Gairdneri)","volume":"6","author":"Berkovitz B. 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