What's the chemical reaction catalysed by nitrate reductase?

[Awol]

subject says it all really. i have been reading about the difference in energy released as per this chart http://i.imgur.com/ug3uF.png . I assume that in aerobic organisms the chemical reaction would be
(NADH + H + 1/2O2) -> (NAD+ + H2O) but how does this work with nitrite reductase in anaerobic respiration?

[JackBean]

And where is the nitrate in your reaction?

Just pick your favourite http://www.googlesyndicatedsearch.com/u ... b%2Fenzyme