ID   1.17.3.4
DE   juglone 3-hydroxylase.
AN   naphthoquinone hydroxylase.
CA   2 juglone + O2 = 2 3,5-dihydroxy-1,4-naphthoquinone + 2 H(+).
CC   -!- Even though oxygen is consumed, molecular oxygen is not incorporated
CC       into the product.
CC   -!- Catalysis starts by incorporation of an oxygen atom from a water
CC       molecule into the substrate.
CC   -!- The naphthalene-1,2,4,8-tetrol intermediate is then oxidized by
CC       molecular oxygen, which is reduced to water.
CC   -!- Also acts on 1,4-naphthoquinone, naphthazarin and 2-chloro-1,4-
CC       naphthoquinone.
CC   -!- Formerly EC 1.14.99.27.
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