4XE5:
reference: Isolation, crystallization and crystal structure determination of bovine kidney Na(+),K(+)-ATPase., Gregersen JL, Mattle D, Fedosova NU, Nissen P, Reinhard L, Acta Crystallogr F Struct Biol Commun. 2016 Apr 1;72(Pt 4):282-7. doi:, 10.1107/S2053230X1600279X. Epub 2016 Mar 16. PMID: 27050261

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