Haem group, Biology

Assignment Help:

Haem Group

A group of compounds called porphyrins are widely distributed in plants, animals and bacteria. Porphyrins associate with metals to form metalloporphyrins which form a variety of compounds. For example chlorophyll about which is a magnesium-porphyrin complex and cytochromes which contain porphyrin group play an important role in intracellular oxidation. When ferrous iron Fe++ is added to a porphyrin protoporphyrin IX, ferrous porphyrin or haem is formed. The molecular structure is shown in figure.  

1978_Haem Group.png

Figure:  Chemical structure of haem group (a), schematic representative of a single submit of haemoglobin (b).

The ferrous iron atom is bound to the four nitrogens of the protoporphyrin ring. The ferrous iron makes two more links, one with the oxygen atom to form oxyhaemoglobin and the other to the globin portion of the molecule at a single amino acid site.


Related Discussions:- Haem group

What is isoniazid, Isoniazid  Serum aminotransferase activity increases...

Isoniazid  Serum aminotransferase activity increases in 10% to 20% of patients taking isoniazid, especially in the early weeks of treatment, but often returns to normal even wh

Staphylococcal food poisoning, Staphylococcal food poisoning results from c...

Staphylococcal food poisoning results from consumption of food containing enterotoxin produced by enterotoxigenic strains of Staphylococcus aureus. It is caused by ingestion of imp

Bioinformatics is important, Why do you think that bioinformatics is import...

Why do you think that bioinformatics is important?         Ans) Today, we can use computers to access much more biological data than still before. You can learn a lot by analysi

What is the typical localization of the tropical forests, What is the typic...

What is the typical localization of the tropical forests regarding latitude? The Tropical rain forests, like the Congo forest and the Amazon forest, are typically located in lo

Human respiration, Human respiration Human beings are adopted for ter...

Human respiration Human beings are adopted for terrestrial mode of life. They conduct pulmonary respiration. This system consists of external nostrils, nasal cavities, pharyn

Respiration, define respiration in diffrent types of animals

define respiration in diffrent types of animals

Acute complications of ptca, Acute Complications of PTCA :  The incide...

Acute Complications of PTCA :  The incidence of complications after PTCA that require emergency surgery has reduced considerably in the present era. Introduction of stents, pe

What is a biosphere?, What is a biosphere? A biosphere is a set of all ...

What is a biosphere? A biosphere is a set of all of the ecosystems of the planet.

Consequences of aging, Consequences of Aging It is hard to enumerate ...

Consequences of Aging It is hard to enumerate the general consequences of aging in different animals. Gradual loss of reproductive ability, neuromuscular coordination and not

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