3CZP:
reference: Polyphosphate-dependent synthesis of ATP and ADP by the family-2 polyphosphate kinases in bacteria., Nocek B, Kochinyan S, Proudfoot M, Brown G, Evdokimova E, Osipiuk J, Edwards AM, Savchenko A, Joachimiak A, Yakunin AF, Proc Natl Acad Sci U S A. 2008 Nov 18;105(46):17730-5. Epub 2008 Nov 10. PMID: 19001261

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