6JKD:
reference: Structural basis for oligomerization of the prokaryotic peptide transporter PepTSo2., Nagamura R, Fukuda M, Kawamoto A, Matoba K, Dohmae N, Ishitani R, Takagi J, Nureki O, Acta Crystallogr F Struct Biol Commun. 2019 May 1;75(Pt 5):348-358. doi:, 10.1107/S2053230X19003546. Epub 2019 Apr 24. PMID: 31045564

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