光合细菌产氢因子的研究进展

光合细菌在固氮的同时盘旋氢气，产氢与固氮是同步进行的。固氮与氢醇共同影响光合细菌的产氢活性，而外源生理条件又影响着固氮酶与氢酶的活性，其中有机碳阻抑吸氢酶表达，促进产氢；氨则抑制固氮活性而降低产氢量；氧气的存在使固氮酶与氢酶都失活，从而抑制放氢反应的进行。

Advances in the conditions of release H2 by photosynthetic bacteria

Photosynthetic bacteria release H2 during N2 fixation. H2 may be evolved either by nitrogenase or hydrogenase,and the activity of the two enzymes,in turn, is influenced by the various physiological conditions. Among those factors, organic carbon restrains the hydrogenase expression but promote the H2 production. On the other hand, ammonium restrains the nitrogenase activity but decreases the H2 production;the existance of oxygen makes both nitrgenase and hydrogenase inactive, which restrains H2 evolved reaction consequently.