1XCL:
reference: Catalytic mechanism of guanidinoacetate methyltransferase: crystal structures of guanidinoacetate methyltransferase ternary complexes., Komoto J, Yamada T, Takata Y, Konishi K, Ogawa H, Gomi T, Fujioka M, Takusagawa F, Biochemistry 2004 Nov 16;43(45):14385-94. PMID: 15533043

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