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Paul Orwin

This is very interesting - it's the first time i've seen a molecular phylogenetic tree that disagrees at the base with the ssu-RNA tree. I'm a little concerned about horizontal gene tranfer (HGT) in interpreting this, though. If I'm not mistaken, tRNA genes are frequently sites of phage integration, leading me to think (perhaps naively) that specialized transduction in nature could lead to significant mixing of these genes among species. This seems to me like it could confound the data in a fundamental and intractable way. I haven't had a chance to look at the paper yet (even though it is open access! just lazy I guess), but I wonder if they addressed this notion?

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