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

Explain the nutritional and functional role of iron, Minerals :- Iron ...

Minerals :- Iron Food Source      Cereals, legumes, meat contamination from iron utensils and soil Nutritional Functional role Essential nutrient: Deficiency lead

Avian influenza (ai), A v i a n influenza (AI) One of only two 'Lis...

A v i a n influenza (AI) One of only two 'List A' diseases of poultry targeted for emergency disease control measures by OIE, avian influenza is a highly contagious viral d

Explain evolutionary relationship among animal groups, Evolutionary relatio...

Evolutionary relationship among various animal groups is depicted in the cladogram given below. P, Q and R respectively shown: a.  Vertebrae, hair and four limbs. b.  B

What are phospholipids, What are phospholipids? Phospholipids are molec...

What are phospholipids? Phospholipids are molecules made of glycerol bound to two long molecules of fatty acids and to one phosphate group. Thus, phospholipids are amphipathic

What is reaction specificity, Reaction specificity Some  enzymes  catal...

Reaction specificity Some  enzymes  catalyze only one  reaction  acting  on  a specific substrate. Example: urease  and  catalase  acts  only  on  urea and  hydrogen peroxide,

How auxins act helping the lateral growth of the stem, How auxins act helpi...

How auxins act helping the lateral (secondary) growth of the stem? The Auxins stimulate the formation of conductive vessels, phloem and xylem, promoting the thickening of the s

Explain post myocardial infarction surgery indications , Explain Post Myoca...

Explain Post Myocardial Infarction Surgery Indications ? Indications for Surgery :  Presence of ventricular septal rupture is an indication for surgery. Timing of surgery is

Eczema, E c z e m a It is inflammatory reaction of epidermal cells...

E c z e m a It is inflammatory reaction of epidermal cells to the substances to which these cells are sensitized. Such substances may be present either in the external or

Differences between mitosis and meiosis, DIFFERENCES BETWEEN MITOSIS AND...

DIFFERENCES BETWEEN MITOSIS AND MEIOSIS    EVENTS  MITOSIS  MEIOSIS  Occurrence  In all the body cells including

Bovine spongiform encephalopathy (bse), B o vi n e spongiform encephalo...

B o vi n e spongiform encephalopathy (BSE) Bovine spongiform encephalopathy (BSE) is a transmissible, neurodegenerative, fatal brain disease of cattle characterized by post

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