HORIZONTAL GENE TRANSFER “is far more pervasive and more radical in its consequences than we could have guessed just a decade ago.” Earlier this year, Cambridge (UK) scientists, Alistair Crisp and Chiara Boschetti, writing in Genome Biology, identified 145 genes in humans that have crossed the (quite permeable) species “barrier.” Our ABO blood group system appears to have been inherited from bacteria, for example.”
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