3BIG:
reference: Structural and Biochemical Characterization of the Type II Fructose-1,6-bisphosphatase GlpX from Escherichia coli., Brown G, Singer A, Lunin VV, Proudfoot M, Skarina T, Flick R, Kochinyan S, Sanishvili R, Joachimiak A, Edwards AM, Savchenko A, Yakunin AF, J Biol Chem. 2009 Feb 6;284(6):3784-92. Epub 2008 Dec 10. PMID: 19073594

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