EC 1.17.3.1     
Accepted name: pteridine oxidase
Reaction: 2-amino-4-hydroxypteridine + O2 = 2-amino-4,7-dihydroxypteridine + (?)
Systematic name: 2-amino-4-hydroxypteridine:oxygen oxidoreductase (7-hydroxylating)
Comments: Different from EC 1.17.3.2 xanthine oxidase; does not act on hypoxanthine.
References:
1.  Yong, Y.-N. Detection of a pteridine oxidase in plants. Plant Sci. Lett. 18 (1980) 169–175.
[EC 1.17.3.1 created 1983]