5AT1:
reference: Structural consequences of effector binding to the T state of aspartate carbamoyltransferase: crystal structures of the unligated and ATP- and CTP-complexed enzymes at 2.6-A resolution., Stevens RC, Gouaux JE, Lipscomb WN, Biochemistry 1990 Aug 21;29(33):7691-701. PMID: 2271528

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