title: Determination of anterior endoderm in Xenopus embryos.
abstract: Grafts of anterior endoderm from embryos at stage 28 or later developed according to their fate (i.e., anterior) when transplanted posteriorly. Conversely, grafts from earlier embryos developed according to their new location (i.e., posterior). However, endoderm grafted along with its mesodermal and ectodermal sheath retained its fate regardless of the stage of the donor. We conclude that anterior endoderm in Xenopus embryos is determined at about stage 25 under the influence of mesoderm.
authors.affiliation: Department of Biology, Faculty of Science, The University of Tehran, Tehran, Iran.
authors.forename: B
authors.initials: B
authors.lastname: Zeynali
authors.forename: B
authors.initials: B
authors.lastname: Kalionis
authors.forename: K E
authors.initials: KE
authors.lastname: Dixon
mesh_terms: D000818:Animals; D019521:Body Patterning / Q000502:physiology*; D004707:Endoderm / Q000166:cytology / Q000502:physiology*; D018398:Homeodomain Proteins / Q000276:immunology / Q000378:metabolism; D007150:Immunohistochemistry; D008648:Mesoderm / Q000502:physiology; D008954:Models, Biological; D016378:Tissue Transplantation; D014981:Xenopus / Q000196:embryology*; D029867:Xenopus Proteins
chemical_list: D018398:Homeodomain Proteins; C089627:PDX1 protein, Xenopus; D029867:Xenopus Proteins