coa+ 4CO9+ 4 pyruvate 4 acetyl-CoA Electrons are transferred to na bound in the 8 Ferredoxin or 8 Ferredoxin or 8 flavodoxin 8 flavodoxin active site of dinitrogenase (oxidized) (reduced) 8 via ferredoxin/ flavodoxin and dinitrogenase reductase 8 Dinitrogenase 8 Dinitrogenase reductase reductase (reduced) (oxidized) 16 ATP 16ADP +16P 8 Dinitrogenase 8 Dinitrogenase reductase (reduced reductase (oxidized +16ATP +16ATP 8 2H++2 2H++2e H+2 HH Dinitrogenase Dinitrogenase (oxidized) (reduced) N≡N→H-N=N-H→N一N 2NH3 HH 2NH H2 2H Diimine azine 4Electrons are transferred to N2 bound in the active site of dinitrogenase via ferredoxin/flavodoxin and dinitrogenase reductase