EC 1.7.1.5     
Accepted name: hyponitrite reductase
Reaction: 2 hydroxylamine + 2 NAD+ = hyponitrous acid + 2 NADH + 2 H+
Glossary: hyponitrous acid = HO-N=N-OH
Other name(s): NADH2:hyponitrite oxidoreductase
Systematic name: hydroxylamine:NAD+ oxidoreductase
Comments: A metalloprotein.
References:
1.  Medina, A. and Nicholas, D.J.D. Hyponitrite reductase in Neurospora. Nature (Lond.) 179 (1957) 533–534.
[EC 1.7.1.5 created 1961 as EC 1.6.6.6, transferred 2002 to EC 1.7.1.5]