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Johansson T, Oswald C, Pedersen A, Törnroth S, Okvist M, Karlsson BG, et al. (September 2005). "X-ray structure of domain I of the proton-pumping membrane protein transhydrogenase from Escherichia coli". Journal of Molecular Biology. 352 (2): 299–312. doi:10.1016/J.JMB.2005.07.022. PMID16083909.