5X3X:
reference: Structure and mechanism of a group-I cobalt energy coupling factor transporter., Bao Z, Qi X, Hong S, Xu K, He F, Zhang M, Chen J, Chao D, Zhao W, Li D, Wang J, Zhang P, Cell Res. 2017 Mar 21. doi: 10.1038/cr.2017.38. PMID: 28322252

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