NADH dehydrogenase (ubiquinone) activity molecular_function NADH coenzyme Q1 reductase activity Reactome:REACT_98202 mitochondrial electron transport complex I activity coenzyme Q reductase activity mitochondrial electron transport complex 1 activity NADH-ubiquinone-1 reductase activity MetaCyc:NADH-DEHYDROG-A-RXN NADH-CoQ reductase activity Reactome:REACT_84378 NADH-ubiquinone oxidoreductase activity complex I (electron transport chain) activity Catalysis of the reaction: NADH + H+ + ubiquinone = NAD+ + ubiquinol. NADH-CoQ oxidoreductase activity NADH-ubiquinone reductase activity ubiquinone reductase activity complex I (NADH:Q1 oxidoreductase) activity complex 1 dehydrogenase activity Reactome:REACT_6310 NADH-Q6 oxidoreductase activity NADH-coenzyme Q oxidoreductase activity reduced nicotinamide adenine dinucleotide-coenzyme Q reductase activity MetaCyc:RXN0-5330 DPNH-coenzyme Q reductase activity GO:0008137 Reactome:REACT_86959 dihydronicotinamide adenine dinucleotide-coenzyme Q reductase activity NADH:ubiquinone oxidoreductase complex activity Reactome:REACT_81943 DPNH-ubiquinone reductase activity NADH:ubiquinone oxidoreductase activity Reactome:REACT_81770 EC:1.6.5.3 NADH-coenzyme Q reductase activity complex I (mitochondrial electron transport) activity Reactome:REACT_102400 RHEA:23155 electron transfer complex I activity Reactome:REACT_33391 Reactome:REACT_96903 type 1 dehydrogenase activity NADH dehydrogenase (quinone) activity