7ATJ:
reference: The structures of the horseradish peroxidase C-ferulic acid complex and the ternary complex with cyanide suggest how peroxidases oxidize small phenolic substrates., Henriksen A, Smith AT, Gajhede M, J Biol Chem 1999 Dec 3;274(49):35005-11. PMID: 10574977

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