1A48:
reference: The structure of SAICAR synthase: an enzyme in the de novo pathway of purine nucleotide biosynthesis., Levdikov VM, Barynin VV, Grebenko AI, Melik-Adamyan WR, Lamzin VS, Wilson KS, Structure 1998 Mar 15;6(3):363-76. PMID: 9551557

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