Regulation of ammonia assimilation, Biology

Regulation of Ammonia Assimilation

Heterotrophic bacteria like Escherichia coli and Klebsiella aerogenes induce the operation of GS-glutamate synthase pathway of ammonia assimilation under conditions of low ammonia and of GDH-pathway under conditions of high ammonia. Thus the two pathways are mutually exclusive and the level of cellular ammonia determines which pathway of ammonia assimilation is likely to operate.

Cyanobacteria like systems have only Gs-glutamate synthase pathway functioning under low or high cellular ammonia. Information about the role of ammonia in metabolic regulation of its two assimilatory pathways in higher plants is virtually unknown. Animals get rid of excess ammonia through the urea cycle in order to escape ammonia toxicity. Plants have no similar mechanism of escaping ammonia toxicity. This might be because land plants evolved under conditions of nitrogen limitation. However plants seem to have developed controls of nitrogen metabolism which ensure that ammonia is reassimilated.

Posted Date: 1/17/2013 5:51:22 AM | Location : United States







Related Discussions:- Regulation of ammonia assimilation, Assignment Help, Ask Question on Regulation of ammonia assimilation, Get Answer, Expert's Help, Regulation of ammonia assimilation Discussions

Write discussion on Regulation of ammonia assimilation
Your posts are moderated
Related Questions
Q What are the major classes into which the phylum is divided? What are the few examples of each and in which form (polyp or medusae) are they found? Coelenterates are divided

characters of phylum rynchocephalia


Applications of Computers in Medical and Nursing Establishment As computers are heavily used for storing and retrieving data the application can be administrative, clinica

true or false. the law of entropy says that all energy is ultimately derived from the sun

Endothecium - Anther Wall Layers The layer of cells lying immediately next to the epidermis is the endothecium, which is responsible for the dehiscence of the anther. It is us

Q. What do you mean by Polyester? Polyester (ES) or polyethylene terephthalate (PET): PET is a very strong transparent glossy film, which has good moisture and gas barrier p

Enumerate the different means of evaluating the implant prior to stage 2 surgery. The Different means for evaluating the implant prior to stage 2; i) Radiographic evaluation

Q. What do you know about Vascular Access ? Femoral and brachial arteries are still the commonest routes of access for aortography. Thoracic Aorta A sound knowledge of

What is Dip Stick Test It is a rapid method of detection of Ketone bodies which you can perform easily. Plastic strips impregnated with a buffered mixture of sodium nitropru