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. 2007 Jun 13;2(6):e517. doi: 10.1371/journal.pone.0000517

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This is an open-access article distributed under the terms of the Creative Commons Public Domain declaration which stipulates that, once placed in the public domain, this work may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose.

This is an open-access article distributed under the terms of the Creative Commons Public Domain declaration, which stipulates that, once placed in the public domain, this work may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose.

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Top. Base pairing between tRNA^Arg2 anticodon and UGU codon (left), and between tRNA^Arg3 anticodon and the AGC and AGU codons. Bottom. I•U, U•C, and U•U base pairing.