4RR5:
reference: Structural and biochemical characterization of MCAT from photosynthetic microorganism Synechocystis sp. PCC 6803 reveal its stepwise catalytic mechanism., Liu Y, Feng Y, Wang Y, Li X, Cao X, Xue S, Biochem Biophys Res Commun. 2015 Feb 13;457(3):398-403. doi:, 10.1016/j.bbrc.2015.01.003. Epub 2015 Jan 9. PMID: 25582772

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