Structural basis for dynamic mechanism of proton-coupled symport by the peptide transporter POT. by Doki, S, Kato, H, Solcan, N, Iwaki, M, Koyama, M, Hattori, M, Iwase, N, Tsukazaki, T, Sugita, Y, Kandori, H, Newstead, S, Ishitani, R, Nureki, O