Explain isozymes, Biology

Assignment Help:

ISOZYMES

Sometimes an  enzyme present  in  the  same  organism is  found  to  have different molecular forms but  catalyzing the  same  reaction. These are called  isozymes. The 1964 Committee  recommended  that  "multiple enzyme forms"  in  a  single species should be known as isozymes. Among many enzymes known to have isozymes, the most  studied  is  lactate  dehydrogenase  (LDffl, which  is  an  important  enzyme  of carbohydrate  metabolism.  This  enzyme  exists  in  five  possible forms  in  most vertebrates. In  fact two basically different types of LDH occur predominantly in the heart and muscle.  The  former consists of  four identical monomers (H). The  latter (muscle LDH) also forms due to the combination of four identical monomers (M) but having  different  amino acid composition,  in  comparison  to the  former. Different combinations  of  H and M  monomers yield  three  additional hybrid enzymes possessing four monomers each. The possible combinations of H and M monomers therefore, produce five  isozymes of LDH. These are:

H4. H3M, H2M2, HM3 and M4

 


Related Discussions:- Explain isozymes

Reason of population growth, Some of the reason for increase in population ...

Some of the reason for increase in population is: 1.         Decline in death for an increase in life expectancy or longevity. 2.         Better medical facilities

What are the four groups of protozoans, Q. What are the four groups of prot...

Q. What are the four groups of protozoans? The four main groups of protozoans are the mastigophores flagellated, like the trypanosome that causes Chagas' disease, the sarcodine

Functions of iron in the body, functions of iron in the body: Iron i...

functions of iron in the body: Iron is the major component in haemoglobin. It helps to carryout oxygen from lungs to the tissues. About 60 to 70% of Iron in the body i

Ecology, Analyse the model that highlights the factors which influence the ...

Analyse the model that highlights the factors which influence the environmental impact of a population

What are SOL, What are sols?  A colloidal system in which solid  partic...

What are sols?  A colloidal system in which solid  particles are dispersed in a liquid is referred to as a sol, to distinguish it from a true solution. In a true solution, the

Explain glucose molecule runs the krebs cycle twice, Why can it be said tha...

Why can it be said that each glucose molecule runs the Krebs cycle twice? Every glucose molecule "cycles" the Krebs cycle twice because after glycolysis each used glucose has g

Explain pound cake test - preformance evaluation, Pound cake test In so...

Pound cake test In some cases, oil or margarine creaming volume is most accuratelymeasured by preparing a regular pound cake, omitting the chemical leavener andmeasuring the vo

Emphysema, Emphysema Emphysema is destructive changes in alveolar wall...

Emphysema Emphysema is destructive changes in alveolar walls and enlargement of air spaces distal to the terminal non-respiratory bronchioles. It is characterized physiolog

Osmoregulation in aqueous environments, Osmoregulation in Aqueous Environme...

Osmoregulation in Aqueous Environments You are aware that the aqueous environments are of two types: i) Freshwater and ii) Seawater. The osmotic concentration of thes

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