2MDF:
reference: Structural and Functional Analysis of the Transmembrane Segment Pair VI and VII of the NHE1 Isoform of the Na(+)/H(+) Exchanger., Alves C, Lee BL, Sykes BD, Fliegel L, Biochemistry. 2014 Jun 10;53(22):3658-70. doi: 10.1021/bi500392y. Epub 2014 May, 28. PMID: 24840010

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