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. Author manuscript; available in PMC: 2009 Dec 1.
Published in final edited form as: Curr Opin Struct Biol. 2008 Nov 5;18(6):726–733. doi: 10.1016/j.sbi.2008.09.007

Figure 2. Substrate binding sites defined in ABC importers.

Figure 2

A. Left, a slab view of the transmembrane cavity in the maltose transporter with the maltose substrate shown in CPK format. Residues of MBP that form the substrate-binding site in the open conformation are colored cyan. Right, a close-up view of the binding site with hydrogen bonds indicated by dashed lines. Figure modified from [8]. B. Ribbon representation of the methionine transporter (MetNI) and the molybdate/tungstate transporter (ModBC) in a “trans-inhibited” state. Substrates bound to the ATPase subunits are shown in CPK format.