title: Immunoreactive collagen in avian and mammalian fossils.
mesh_terms: D000818:Animals; D001717:Birds / Q000378:metabolism*; D003094:Collagen / Q000032:analysis*; D005580:Fossils; D008322:Mammals / Q000378:metabolism*; D010163:Paleontology; D010802:Phylogeny; D011863:Radioimmunoassay / Q000379:methods; D013045:Species Specificity
chemical_list: D003094:Collagen