... (NH4)6Mo7O24, 0 .2; Ni(NO3 )2, 0.03; Na2SeO3, 0.03; CoCl2, 0.6 and Na2B2O7, 0.1 The optical density, the concentrations of nitrate [17] and nitrite [18], the pO2 and the pH of the medium were monitored, ... T2Cu center with an electron from the T1Cu center, the proton of this hydrogen bond is transferred from the Asp98 residue to the oxygen atom of the substrate, yielding an OẳNOH intermediate The ... role in the modulation of the redox potential of the T2Cu center inuencing the intramolecular electron- transfer rate between both copper centers Materials and methods Organisms and growth Ps chlororaphis...