3GQB:
reference: Crystal structure of A(3)B(3) complex of V-ATPase from Thermus thermophilus., Maher MJ, Akimoto S, Iwata M, Nagata K, Hori Y, Yoshida M, Yokoyama S, Iwata S, Yokoyama K, EMBO J. 2009 Nov 5. PMID: 19893485

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