固氮反应 The reduction of n2 to NH3 is thermodynamically favorable no+3Ho-2NH 4G 0=-335kJ/mol But kinetically unfavorable: the bond energy for the triple bond in n2 is 942 kJ/mol oN+8H+ +8e +16ATP+16H,-> 2NH3+H2+16ADP+16P;固氮反应 •N2 + 8H+ +8e - + 16ATP + 16H2O → • 2NH3 + H2 + 16ADP + 16Pi The reduction of N2 to NH3 is thermodynamically favorable : • N2 + 3H2 → 2NH3 G` o=-33.5kJ/mol But kinetically unfavorable: the bond energy for the triple bond in N2 is 942 kJ/mol