Nitrogen fixation This process is carried out by the nitrogenase 固氮酶 complex, which consists of a reductase and an iron-molybdenum E containing nitrogenase. At least 16ATP molecules are hydrolyzed to form two molecules of ammonia. Leghemoglobin豆血 红蛋白 is used to protect the nitrogenase in the rhizobium from inactivation by O2
Nitrogen fixation This process is carried out by the nitrogenase 固氮酶 complex, which consists of a reductase and an iron-molybdenum 钼 - containing nitrogenase. At least 16ATP molecules are hydrolyzed to form two molecules of ammonia. Leghemoglobin 豆血 红蛋白is used to protect the nitrogenase in the Rhizobium from inactivation by O2
2ADP + 2P Ferredoxin. Reductase、 7 Nitrogenase\∠N2+8H Photosynthesis or oxidative electron transport Ferredoxin Reductase red Nitrogenase ox 2NH3+H2 2ATP Repeated eight times Fig. 2. The fow of electrons in the nitrogenase-catalyzed reduction of N2
nitrogenase 铁氧还蛋 白
Nitrogen assimilation Ammonia is assimilated by all organisms into organIc nitrogen-containing compounds(amino acids, nucleotides, etc.) by the action of glutamate dehydrogenase (to form glutamate) and glutamine synthetase (to form glutamine)
Nitrogen assimilation Ammonia is assimilated by all organisms into organic nitrogen-containing compounds(amino acids,nucleotides,etc.) by the action of glutamate dehydrogenase (to form glutamate) and glutamine synthetase (to form glutamine)
Amino acid family CITRIC ACID CYCLE LyE GLYCOLYSIS L GLYCOLYSIS ENTOSE PHOSPHATE ATV ↓ T
Amino acid family
Amino acid degradation Amino acids are degraded by the removal of the a-amino group and the conversion of the resulting carbon skeleton into one or more metabolic intermediates
Amino acid degradation • Amino acids are degraded by the removal of the α-amino group and the conversion of the resulting carbon skeleton into one or more metabolic intermediates