3BYC:
reference: Rapid determination of hydrogen positions and protonation states of diisopropyl fluorophosphatase by joint neutron and X-ray diffraction refinement., Blum MM, Mustyakimov M, Ruterjans H, Kehe K, Schoenborn BP, Langan P, Chen JC, Proc Natl Acad Sci U S A. 2009 Jan 20;106(3):713-8. Epub 2009 Jan 9. PMID: 19136630

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