Springer, M S Phylogeny, rates of evolution, and patterns of codon usage among sea urchin retroviral-like elements, with implications for the recognition of horizontal transfer. [electronic resource] - Molecular biology and evolution Mar 1995 - 219-30 p. digital Publication Type: Comparative Study; Journal Article ISSN: 0737-4038 Standard No.: 10.1093/oxfordjournals.molbev.a040196 doi Subjects--Topical Terms: AnimalsBase SequenceBiological EvolutionCell Nucleus--geneticsGene Transfer, HorizontalGenetic CodeGenetic Variation--geneticsHistones--geneticsMolecular Sequence DataRNA, Ribosomal--geneticsRNA-Directed DNA Polymerase--geneticsRetroelements--geneticsSea Urchins--geneticsTime Factors