4H6C:
reference: Crystal structures of Physcomitrella patens AOC1 and 2: Insights into the enzyme mechanism and differences in substrate specificity., Neumann P, Brodhun F, Sauer K, Herrfurth C, Hamberg M, Brinkmann J, Scholz J, Dickmanns A, Feussner I, Ficner R, Plant Physiol. 2012 Sep 17. PMID: 22987885

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