QuickTime and a TIFF (Uncompressed) decompressor are needed

QuickTime and a TIFF (Uncompressed) decompressor are needed

QuickTime and a TIFF (Uncompressed) decompressor are needed to see this picture. NITROGEN METABOLISM Nitrogen is essential for all organisms (in amino acids and nucleic acids). oxidative

Most of the conversions between organic and inorganic nitrogen are catalyzed by bacterial and archaeal enzymes. reductive QuickTime and a TIFF (Uncompressed) decompressor

are needed to see this picture. plants animals fungi Nitrogen fixation Reduced nitrogen (amines, amides) is required for proteins, nucleic acids, et al. Environmental supplies of nitrogen are oxidized (N2,

NO3-) Issues include N fixation (prokaryotes only) N2 + 16 ATP + 10 H+ + 8 eNitrogenase reductase, nitrogenase 2 NH4+ + H2 + 16 ADP + 16 Pi and nitrate reduction (bacteria, plants, fungi) QuickTime and a TIFF (Uncompressed) decompressor are needed to see this picture. Nitrate reductase, nitrite reductase +5 +3

+3 -3 QuickTime and a TIFF (Uncompressed) decompressor are needed to see this picture. In bacteria, the electron donor is NADPH Ammonium assimilation glutamate dehydrogenase

NADPH -KG NH4+ NADP+ glu H2 O QuickTime and a TIFF (Uncompressed) decompressor

are needed to see this picture. Ammonium assimilation Glutamine synthetase GOGAT (glutamine oxo-glutarate amino transferase) ATP NH4+ ADP + Pi

GS glu gln NAD+ or Fd(ox) NADH Fd(red) GOGAT

glu -KG Glutamate and glutamine are major NH2 donors through transaminases e.g., Glu +OAA -KG + Asp Glutamate and glutamine are major NH2 donors

through transaminases e.g., Glu +OAA -KG + Asp Urea cycle: removal of excess N Pre-urea cycle: formation of carbamyl phosphate Urea cycle: Lose two amino-N

and a CO2 Follow the N from carbamoyl-P (green arrow) and the N from aspartate (red arrow). How much energy does it take to remove two amino-nitrogens?

How many of the reactions that we have studied are represented in excretion of excess nitrogen? Summary Nitrogen enters the biosphere through plants, fungi, but mainly bacteria and archaea Plants, fungi, and bacteria reduce nitrate nitrogen to ammonium Ammonium is incorporated into organic molecules by glutamate dehydrogenase and glutamine synthase/GOGAT Other amino acids are formed by transamination The urea cycle removes nitrogen from ammonia and alanine as urea

Recently Viewed Presentations

  • The Apostasy 6th Seal Events The Great Apostasy

    The Apostasy 6th Seal Events The Great Apostasy

    An orb, a scepter, a ring or key, and the crown are given. "The Princes and Princesses, the Peers and Peeresses shall put on their coronets and caps, and the trumpets shall sound, and by a signal given, the great...
  • Iron Age and Celts

    Iron Age and Celts

    Recap - life of celts Fashion and jewelry Iron weapons Food and farming Homes - Raths, hillforts, promontory forts, crannog Pagan gods and festivals Afterlife Ogham IRON AGE AND CELTS 1st Yr Iron age in ireland Began in Ireland 500...
  • Apprendere - units.it

    Apprendere - units.it

    E l'apprendimento?. Un . cambiamento relativamente permanente derivato dall'esperienza precedente e non dovuto a maturazione o a condizioni temporanee dell'organismo
  • CS479/679 Pattern Recognition Spring 2006 - Prof. Bebis

    CS479/679 Pattern Recognition Spring 2006 - Prof. Bebis

    CS479/679 Pattern Recognition Dr. George Bebis ... joint density Example Classify a fish given that it is light (c1) and was caught in south Atlantic (b2) -- no evidence about what time of the year the fish was caught nor...
  • Proposals from the Informal Working Group on ACSF

    Proposals from the Informal Working Group on ACSF

    Warning during transition phase shall be escalating and demanding to encourage the driver to take over the control manually as soon as possible. Vehicle is not allowed to be brought to standstill by the system during the transition phase except...
  • Integrating Wind on Weak Grids  CREZ Panhandle Region

    Integrating Wind on Weak Grids CREZ Panhandle Region

    Integrating Wind on Weak Grids - CREZ Panhandle Region Sharyland Utilities July 16, 2014 Background In parallel with the ERCOT PREZ Study, Sharyland has been evaluating the transmission system performance in the Panhandle region, specifically: Including generation resources meeting Section...
  • Public Finance and Land Disputes in China

    Public Finance and Land Disputes in China

    The problem must be resolved at the lowest level (township party secretary 2007)" * Cadre evaluation system Incentive to keep conflicts out of court; keep conflicts at local level Mediation as core duty of township and village leaders Hunan case...
  • DRILL # 50 OR 51 5/13/15 Name 2

    DRILL # 50 OR 51 5/13/15 Name 2

    Card 1. Describe what an enzyme is, label and explain the lock and key model, and tell what conditions would make the enzyme not work properly.. Include: catalyst, enzyme substrate complex, enzyme, substrate, active site, product, and denature