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Journal of Molecular Evolution|January 1, 1987
Progressive sequence alignment as a prerequisite to correct phylogenetic treesD F Feng, R F DoolittleJournal of Molecular Evolution|April 1, 1997
Converting amino acid alignment scores into measures of evolutionary time: a simulation study of various relationshipsD F Feng, R F DoolittleCurrent Topics in Microbiology and Immunology|January 1, 1992
Tracing the origin of retrovirusesR F Doolittle, D F FengProceedings of the National Academy of Sciences of the United States of America|December 16, 1997
Determining divergence times with a protein clock: update and reevaluationD F Feng, G Cho, R F DoolittleJournal of Molecular Evolution|January 1, 1984
Aligning amino acid sequences: comparison of commonly used methodsD F Feng, M S Johnson, R F DoolittleNature|February 9, 1984
Computer-based characterization of epidermal growth factor precursorR F Doolittle, D F Feng, M S JohnsonTrends in Biochemical Sciences|December 1, 1992
Evolution by acquisition: the case for horizontal gene transfersM W Smith, D F Feng, R F DoolittleScience (New York, N.Y.)|January 26, 1996
Determining divergence times of the major kingdoms of living organisms with a protein clockR F Doolittle, D F Feng, S Tsang, et al.Journal of Molecular Evolution|November 1, 1990
A naturally occurring horizontal gene transfer from a eukaryote to a prokaryoteR F Doolittle, D F Feng, K L Anderson, et al.Current Topics in Microbiology and Immunology|January 1, 1990
Retrovirus phylogeny and evolutionR F Doolittle, D F Feng, M A McClure, et al.Pageof 12