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

What is energy, What is Energy ? Energy Energy is defined as the cap...

What is Energy ? Energy Energy is defined as the capacity to do work. Work is defined as the movement of a mass, or the product of the force and the distance through which t

Fate map - gastrulation in chick, Fate Map - Gastrulation in Chick All...

Fate Map - Gastrulation in Chick All the three main germinal layers (ectoderm, mesoderm, endoderm) are made from cells initially located in the epiblast in area pellucida, hen

Food chain, Food chain is the simplest representation of energy flow in th...

Food chain is the simplest representation of energy flow in the community. At the base is energy stored in the plants, which are eaten by the small organisms, which in turn are ea

What is choanoflagellate. explain in brief., What is Choanoflagellate? Expl...

What is Choanoflagellate? Explain in brief. The protozoans which resemble the choanocyte cells found in sponges. They have a collar of microvilli which surround a central flage

What is the aim of milling, What is the aim of milling The aim of milli...

What is the aim of milling The aim of milling (the process including crushing and grinding) is to obtain preferentially a flour, in which the constituents of the endosperm cell

Do fats with one or more ''kinky'' tail fatty acids, Do fats with one or mo...

Do fats with one or more 'kinky' tail fatty acids tend to be solid or liquid at room temperature? These are found in triglycerides forming what? Solid fats or oils? Is it opposite

Observing root hairs, Observing root hairs Study the root hairs with a ...

Observing root hairs Study the root hairs with a hand lens and view how they are constructed.

Describe the number of implants, Number of Implants The use of more imp...

Number of Implants The use of more implants decreases the number of pontics and the associated mechanics and strains on the prosthesis, and dissipates stresses more effectively

Explain changing body composition with ageing, Explain Changing Body Compos...

Explain Changing Body Composition with Ageing? With ageing, a progressive decline in the water content and the lean body mass is accompanied by an increasing proportion of body

Explain therapeutic nutrition, Explain therapeutic  nutrition This ne...

Explain therapeutic  nutrition This necessitates dietitian's possessing a wide variety of skills. Beyond the technical knowledge and practical skills dietitians needs to have

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