3PRH:
reference: Importance of single molecular determinants in the fidelity of expanded genetic codes., Antonczak AK, Simova Z, Yonemoto IT, Bochtler M, Piasecka A, Czapinska H, Brancale A, Tippmann EM, Proc Natl Acad Sci U S A. 2011 Jan 11. PMID: 21224416

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