4HYV:
reference: `In crystallo' substrate binding triggers major domain movements and reveals magnesium as a co-activator of Trypanosoma brucei pyruvate kinase., Zhong W, Morgan HP, McNae IW, Michels PA, Fothergill-Gilmore LA, Walkinshaw MD, Acta Crystallogr D Biol Crystallogr. 2013 Sep 1;69(Pt 9):1768-79. doi:, 10.1107/S0907444913013875. Epub 2013 Aug 17. PMID: 23999300

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