3TK7:
reference: Adherence to Burgi-Dunitz stereochemical principles requires significant structural rearrangements in Schiff-base formation: insights from transaldolase complexes., Light SH, Minasov G, Duban ME, Anderson WF, Acta Crystallogr D Biol Crystallogr. 2014 Feb;70(Pt 2):544-52. doi:, 10.1107/S1399004713030666. Epub 2014 Jan 31. PMID: 24531488

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