Enzyme-activity control, Biology

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.

Posted Date: 1/17/2013 5:38:40 AM | Location : United States







Related Discussions:- Enzyme-activity control, Assignment Help, Ask Question on Enzyme-activity control, Get Answer, Expert's Help, Enzyme-activity control Discussions

Write discussion on Enzyme-activity control
Your posts are moderated
Related Questions
Explain Energy demand for Sedentary or Light Activity Lifestyles? These people have occupations that do not demand much physical effort, are not required to walk long distances

Explain some Effect of Inadequate nutrition? Inadequate nutrition ranks as one of the major problems of old age. Various factors which may be responsible for the change in one

Explain in details about Respiratory system Respiratory system starts from nostrils through which we inhale air in the nasal cavity. Then, air enters pharynx and goes through l

How is gas exchange done in flatworms? Platyhelminthes exchange gases exclusively by diffusion by their body surface. This is only possible because all cells are localized rela

What is Dinoflagellates ? Dinoflagellata or dinoflagellates , are characteristically unicellular photosynthetic organisms that usually have two flagellae. One flagellum typi

Particulate Theory (i)         Maupertuis (1689-1759) proposed that the body of each parent give rise to minute particles. (ii)         In sexual reproduction, these particl

Explain the Urinary excretion of Ascorbic Acid? The urinary excretion of ascorbic acid falls when the dietary intake is low. Since the tissues are not saturated, a greater part

Purpose of Supervision: Purpose: To help the personnel to grow, to know themselves and what they need in order to render the most efficient service and to give them assistance

Long buccal nerve The long buccal nerve is a branch of the mandibular division of the trigeminal nerve which provides sensory innervation to the buccal gingiva and mucosa of th

Q. Spoilage of butter? Butter, which has a high content of fat, is subject to rancidity and microbial spoilage due to contaminated cream from which it has been prepared