1.7.5.1	nitrate + a quinol = nitrite + a quinone + H2O	-	-	
1.7.5.1	nitrate + a quinol = nitrite + a quinone + H2O	electrons flow in the overall thermodynamically downhill direction from menaquinol (MQ) or ubiquinol (UQ) through the two hemes of NarI, the four [Fe-S] clusters of NarH, and then through the single [4Fe-4S] cluster of NarG to the Mo-bisPGD cofactor, where nitrate is reduced to nitrite	741900