2XR7:
reference: Structural basis for modification of flavonol and naphthol glucoconjugates by Nicotiana tabacum malonyltransferase (NtMaT1)., Manjasetty BA, Yu XH, Panjikar S, Taguchi G, Chance MR, Liu CJ, Planta. 2012 May 19. PMID: 22610270

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