6CTS:
reference: Proposed mechanism for the condensation reaction of citrate synthase: 1.9-A structure of the ternary complex with oxaloacetate and carboxymethyl coenzyme A., Karpusas M, Branchaud B, Remington SJ, Biochemistry 1990 Mar 6;29(9):2213-9. PMID: 2337600

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