immobilized urease ( urea amidohyrdrolase , ec 3.5.1.5 ) was used to assay urea using co2 as the volatile product , and alcohol dehydrogenase ( alcohol : nad+ oxidoreductase , ec 1.1.1.1 ) was used to assay nadh using ethanol as the volatile product .
C0001942
alcohol dehydrogenase
C0030016
ec 1