reticulitermes flavipes termites synthesize uric acid via purine-nucleoside phosphorylase ( purine-nucleoside : orthophosphate ribosyltransferase , ec 2.4.2.1 ) and xanthine dehydrogenase ( xanthine : nad ( + ) oxidoreductase , ec 1.2.1.37 ) , but their tissues lack uricase ( urate : oxygen oxidoreductase , ec 1.7.3.3 ) or any other enzyme that degrades uric acid .
C0041931
uricase
C0030016
oxidoreductase