3M4Y:
reference: The critical roles of residues P235 and F236 of subunit A of the motor protein A-ATP synthase in P-loop formation and nucleotide binding., Kumar A, Manimekalai MS, Balakrishna AM, Priya R, Biukovic G, Jeyakanthan J, Gruber G, J Mol Biol. 2010 Sep 3;401(5):892-905. Epub 2010 Jul 6. PMID: 20615420

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