6-Hydroxylation of the pteridine ring by xanthine oxidase.
D000818:Animals; D002845:Chromatography; D006863:Hydrogen-Ion Concentration; D008099:Liver / Q000201:enzymology; D011621:Pteridines / Q000378:metabolism*; D051381:Rats; D013053:Spectrophotometry; D014969:Xanthine Oxidase / Q000378:metabolism*
D011621:Pteridines; D014969:Xanthine Oxidase