4Y0L:
reference: The Structure and Interactions of Periplasmic Domains of Crucial MmpL Membrane Proteins from Mycobacterium tuberculosis., Chim N, Torres R, Liu Y, Capri J, Batot G, Whitelegge JP, Goulding CW, Chem Biol. 2015 Aug 20;22(8):1098-107. doi: 10.1016/j.chembiol.2015.07.013. Epub , 2015 Aug 13. PMID: 26278184

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