title: Constraints on protein evolution and the age of the eubacteria/eukaryote split.
authors.affiliation: Department of Zoology, University of Florida, Gainesville 32611-8525, USA.  miyamoto@zoo.ufl.edu
authors.forename: M M
authors.initials: MM
authors.lastname: Miyamoto
authors.forename: W M
authors.initials: WM
authors.lastname: Fitch
mesh_terms: D000818:Animals; D001105:Archaea / Q000145:classification*; D019843:Archaeal Proteins / Q000737:chemistry; D001419:Bacteria / Q000145:classification*; D001426:Bacterial Proteins / Q000737:chemistry; D005075:Biological Evolution; D004447:Echinodermata; D005057:Eukaryotic Cells; D019143:Evolution, Molecular; D010163:Paleontology; D011387:Prokaryotic Cells; D011506:Proteins / Q000737:chemistry*; D013997:Time Factors; D014714:Vertebrates
chemical_list: D019843:Archaeal Proteins; D001426:Bacterial Proteins; D011506:Proteins