title: Collagen synthesis in frog embryo endoderm cells.
mesh_terms: D000818:Animals; D001001:Anura / Q000196:embryology*; D003094:Collagen / Q000096:biosynthesis*; D004475:Ectoderm / Q000378:metabolism; D004707:Endoderm / Q000378:metabolism*; D008648:Mesoderm / Q000378:metabolism; D011392:Proline / Q000378:metabolism; D014316:Tritium
chemical_list: D014316:Tritium; D003094:Collagen; D011392:Proline