Review Article
The State of the Nitric Oxide Cycle in Respiratory Tract Diseases
Figure 1
Nitric oxide (NO) cycle. NO2-: nitrite anion; NO3-: nitrate anion; NO, N2O3, NO2, and N2O4: nitric oxides I, II, III, and IV, respectively; RSH: thiols; RSNO: nitrosothiols; NO+: nitrosonium; OONO-: peroxynitrite; O2-: superoxide anion radical.