6GS1:
reference: Structure of Prototypic Peptide Transporter DtpA from E. coli in Complex with Valganciclovir Provides Insights into Drug Binding of Human PepT1., Ural-Blimke Y, Flayhan A, Strauss J, Rantos V, Bartels K, Nielsen R, Pardon E, Steyaert J, Kosinski J, Quistgaard EM, Low C, J Am Chem Soc. 2019 Jan 15. doi: 10.1021/jacs.8b11343. PMID: 30644743

This OCA Structure page
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