ID 1.3.99.19 DE quinoline-4-carboxylate 2-oxidoreductase. AN quinaldic acid 4-oxidoreductase. AN quinoline-4-carboxylic acid 2-oxidoreductase. CA A + H2O + quinoline-4-carboxylate = 2-oxo-1,2-dihydroquinoline-4- CA carboxylate + AH2. CC -!- Quinoline, 4-methylquinoline and 4-chloroquinoline can also serve as CC substrates for the enzyme from Agrobacterium sp. 1B. CC -!- Iodonitrotetrazolium chloride, thionine, menadione and 2,6- CC dichlorophenolindophenol can act as electron acceptors. //