DNA phosphorothioation is widespread and quantized in bacterial genomes.
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Proc Natl Acad Sci U S A. 2011 Feb 15;108(7):2963-8. doi: 10.1073/pnas.1017261108. Epub 2011 Feb 1.
Proc Natl Acad Sci U S A. 2011.
PMID: 21285367
Free PMC article.