Ammonia Assimilation

The assimilation ofNH3 obtained from N2 reduction occurs principally via the glutamine synthetase-glutamate synthase (GS-GOGAT) pathway. The first enzyme catalyzes the ATP-dependent assimilation of ammonia into glutamine using glutamate as a substrate:

The second enzyme catalyzes the reductive transfer of the amide group from glutamine to a-ketoglutarate, forming two molecules of glutamate. The reductants are NAD(P)H or reduced ferredoxin (Fdxred):

Glutamine + a-ketoglutarate + NAD(P)H(or Fdxred) ! 2glutamate + NA(D)P+(or Fdxox)

One glutamate serves to keep the pathway going, whereas the other represents the gain in organic nitrogen.

Was this article helpful?

0 0
Worm Farming

Worm Farming

Do You Want To Learn More About Green Living That Can Save You Money? Discover How To Create A Worm Farm From Scratch! Recycling has caught on with a more people as the years go by. Well, now theres another way to recycle that may seem unconventional at first, but it can save you money down the road.

Get My Free Ebook


Post a comment