title: The fine structure of developing unit collagenous fibrils in the chick.
mesh_terms: D000818:Animals; D002574:Cervical Vertebrae / Q000196:embryology; D002642:Chick Embryo; D003094:Collagen / Q000096:biosynthesis; D003238:Connective Tissue / Q000196:embryology*; D003239:Connective Tissue Cells; D006025:Glycosaminoglycans / Q000378:metabolism; D008854:Microscopy, Electron; D008870:Microtubules / Q000032:analysis; D013194:Staining and Labeling; D014332:Tropocollagen / Q000378:metabolism
chemical_list: D006025:Glycosaminoglycans; D014332:Tropocollagen; D003094:Collagen