What is the turnover number of the enzyme, Biology

Assignment Help:

Hydrolytic driving force. The hydrolysis of pyrophosphate to orthophosphate is important in driving forwards biosynthetic reactions such as the synthesis of DNA. THis hydrolytic reaction is catalyzed in E. coli by a pyrophosphatase that has a mass of 120 kd and consists of 6 identical subunits. For this enzyme, a unit of activity is defined as the amount of enzyme that hydrolyzes 10µmol of pyrophosphate in 15min at 37degrees celsius under std assay conditions. The purified enzyme has a Vmax of 2800 units per milligram of enzyme.

(a)How many moles of substrate are hydrolyzed persecond per milligram of enzyme when the substrate conc is much greater than KM?

(b)How many moles of active sites are there in 1mg of enzyme? Assume that each subunit has one active site.

(c)What's the turnover number of the enzyme? Compare this value with others mentioned in this chapter.


Related Discussions:- What is the turnover number of the enzyme

What are the three cell types that form the osseous tissue, What are the th...

What are the three main cell types that form the osseous tissue? What are their functions? The three major cell types of the osseous tissue are the osteoblasts, the osteocytes

Enumerate various factors controlling osseointegration, Q. Enumerate variou...

Q. Enumerate various factors controlling osseointegration? The factors controlling osseointegration are: i) Occlusal load ii) Biocompatibility of the material iii) Imp

What is the way of life of sponges, Q What is the way of life of sponges? ...

Q What is the way of life of sponges? Sponges live exclusively in an aquatic environment and they are attached by their base to a substrate fixation ground. Sponges are filteri

Heat removal of gutta percha-endodontics principles, Heat removal of Gutta ...

Heat removal of Gutta percha: -    Heated plugger. -    Touch-N-Heat or system B used to thermo soften and remove gutta-percha from root canal systems. -    The cross-sectional

Determine food sources of ascorbic acid (vitamin c), Determine Food Sources...

Determine Food Sources of ascorbic acid (vitamin c)? Food sources of vitamin C include: Rich sources: Amla and guava. Good sources: Drumstick leaves, other leafy ve

Genetics what is this type of gene frequency change called, An hypothesis f...

An hypothesis for the extinction of the dinosaurs is that the earth had been hit by a gigantic meteor that caused the death of those big reptiles. In that case the entire genetic p

Define the antigen-presenting cells of the immune system, Q. What are the a...

Q. What are the antigen-presenting cells of the immune system? The antigen-presenting cells of the immune system also known as APC cells are cells that do digestion and phagocy

Modern cell theory, MODER N CELL THEORY Also known as cell doctrine or...

MODER N CELL THEORY Also known as cell doctrine or cell principle. [Cell theory + cell lineage theory = cell principle] Schleiden-Schwann's cell theory and cell lineage

Why enzymes work to speed up a chemical reaction, Enzymes work to speed up ...

Enzymes work to speed up a chemical reaction by: a. attaching coenzymes to the substrate b. heating up the substrate c. lowering the activation energy of the reaction d. supplyi

Estimation of protein by carcass nitrogen analysis method, Define Estimatio...

Define Estimation of protein by Carcass nitrogen analysis method? Carcass nitrogen analysis: This method includes Nitrogen retention method Net protein utilization

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