6FFL:
reference: Structural and functional characterization of a maltose/maltodextrin ABC transporter comprising a single solute binding domain (MalE) fused to the transmembrane subunit MalF., Licht A, Bommer M, Werther T, Neumann K, Hobe C, Schneider E, Res Microbiol. 2018 Sep 4. pii: S0923-2508(18)30126-8. doi:, 10.1016/j.resmic.2018.08.006. PMID: 30193862

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