1.7.1.15	metabolism	the enzyme is necessary for nitrate/nitrite assimilation but also either detoxify nitrite or carries out fermentative ammonification in support of anaerobic catabolism. The enzyme confers a significant benefit during fermentative growth that reflects fermentative ammonification rather than detoxification. Fermentative ammonification by the enzyme allows for the energetically favorable fermentation of glucose to formate and acetate	
1.7.1.15	physiological function	isoform NIA1 is the more efficient nitrite reductase while isoform NIA2 exhibits higher nitrate reductase activity	
1.7.1.15	physiological function	isoform NIA1 is the more efficient nitrite reductase while isoform NIA2 exhibits higher nitrate reductase activity, reaction of EC 1.7.1.1	
1.7.1.15	physiological function	the enzyme is a key contributor to regulation of the nitric oxide level during nitrate respiration