2X79:
reference: Molecular basis of alternating access membrane transport by the sodium-hydantoin transporter Mhp1., Shimamura T, Weyand S, Beckstein O, Rutherford NG, Hadden JM, Sharples D, Sansom MS, Iwata S, Henderson PJ, Cameron AD, Science. 2010 Apr 23;328(5977):470-3. PMID: 20413494

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