Enzyme-activity control, Biology

Assignment Help:

Enzyme-activity Control

Availability of the substrate, NADH and nitrate would be an important determinant of the rate of nitrate assimilation. In addition, there are number of substances which are known to cause reversible inactivation of nitrate reductase under reducing condition (figure)

1697_Enzyme-activity Control.png

Figure: regulation of assimilatory nitrate reductase (NR), reversible inactivation of NR by combination with hydroxylamine, cyanide, or superoxide and reversal of this inactivation by blue light in the presence of flavin; inactivation by combination with specific binding proteins or by limited proteoiysis. Enzyme synthesis is regulated by positive effector-nitrate, plastidic factor, light and negative effectors derived from ammonia.


Related Discussions:- Enzyme-activity control

Phylum Coelenterata, What are the classes in Phylum coelenterata?

What are the classes in Phylum coelenterata?

Briefly describe the mechanism, List and briefly describe the mechanisms th...

List and briefly describe the mechanisms that prevent acid-base imbalances from appearing in the body. In addition, indicate where each mechanism functions most significantly.

The intine layer, The Intine Layer As soon as the tetrads release the ...

The Intine Layer As soon as the tetrads release the microspores, the inner layer of the pollen wall (intine) is formed. Proteinaceous lamellae are embedded in the matrix of th

Early pre-operative care of cardiac surgical patient, Early Pre-operative C...

Early Pre-operative Care   1. Admission of patient-usual admission procedure to be completed. 2. Assessment of the patient. 3. History 4. Physical examination

Progressive senescence - senescence, Progressive senescence - Senescence ...

Progressive senescence - Senescence This is the third category of senescence. Here also the leaves are shed but it is gradual senescence of leaves up the stem. For example, th

Buffalo-pox, Buffalo-pox The disease is caused by an orthopox virus, c...

Buffalo-pox The disease is caused by an orthopox virus, closely related to the vaccinia virus. It is not clear whether it should be considered a separate virus or not. By RE m

What are lateral meristems, What are lateral meristems? Where can they be f...

What are lateral meristems? Where can they be found and which type of plant growth do they promote? Lateral, or secondary, meristems, are the cambium and the phellogen (also ca

Investigations of food borne diseases, Q. Investigations of food borne dise...

Q. Investigations of food borne diseases? Most important aspect of food borne disease would be to collect the right sample. Now, what procedure to follow while collecting th

Describe the terms diffusion osmosis and filtration, Describe the terms dif...

Describe the terms diffusion, osmosis and filtration. Explain why each process is important for the human body.

Aschelminthes, In what part of the human body ASchelminthes found?

In what part of the human body ASchelminthes found?

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd