title: Species-specific proteins in fossils.
abstract: With a solid-phase radioimmunoassay it has been possible to detect species-specific collagen and albumin fossils as old as 1.9 million years. This technique may provide new data on the genetic relations of fossil species to each other and to living forms.
mesh_terms: D000418:Albumins / Q000032:analysis; D000818:Animals; D005075:Biological Evolution; D003094:Collagen / Q000032:analysis; D005580:Fossils; D049690:History, Ancient; D006801:Humans; D010163:Paleontology; D011506:Proteins / Q000032:analysis*; D011863:Radioimmunoassay; D051381:Rats; D013045:Species Specificity
chemical_list: D000418:Albumins; D011506:Proteins; D003094:Collagen