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  • Title: Microbial genes in the human genome: lateral transfer or gene loss?
    Author: Salzberg SL, White O, Peterson J, Eisen JA.
    Journal: Science; 2001 Jun 08; 292(5523):1903-6. PubMed ID: 11358996.
    Abstract:
    The human genome was analyzed for evidence that genes had been laterally transferred into the genome from prokaryotic organisms. Protein sequence comparisons of the proteomes of human, fruit fly, nematode worm, yeast, mustard weed, eukaryotic parasites, and all completed prokaryote genomes were performed, and all genes shared between human and each of the other groups of organisms were collected. About 40 genes were found to be exclusively shared by humans and bacteria and are candidate examples of horizontal transfer from bacteria to vertebrates. Gene loss combined with sample size effects and evolutionary rate variation provide an alternative, more biologically plausible explanation.
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