6HFB:
reference: Inward-facing conformation of a multidrug resistance MATE family transporter., Zakrzewska S, Mehdipour AR, Malviya VN, Nonaka T, Koepke J, Muenke C, Hausner W, Hummer G, Safarian S, Michel H, Proc Natl Acad Sci U S A. 2019 Jun 3. pii: 1904210116. doi:, 10.1073/pnas.1904210116. PMID: 31160466

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