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

Accidents resulting in death, Accidents Resulting in Death Accidents t...

Accidents Resulting in Death Accidents that cause death are dealt with in a different way. The law requires full compensation to the widow for complete life or until remarriag

Acrodynamics, ACRODYNAM IC S Division of air in lungs. Measured by sp...

ACRODYNAM IC S Division of air in lungs. Measured by spirometer. 1. Tidal Air (T.A.): Quantity of air taken in or given out in a breath 500 cc. 2. Inspiratory Reserv

Echinoderms, What is the classification scheme for echinoderms?

What is the classification scheme for echinoderms?

What is biogenetic law and define bilateral symmetry, What is Biogenetic La...

What is Biogenetic Law and define Bilateral symmetry? In brief, ontogeny recapitulates phylogeny. Or, developmental or embryological sequence of an animal repeats the evolution

What are the main available vaccines against poliomyelitis, Q. What are the...

Q. What are the main available vaccines against poliomyelitis? The vaccines (medicines) used against poliomyelitis are the Sabin vaccine and the Salk vaccine. The Sabin vaccine

What are plant hormones, What are plant hormones? Plant hormones, also ...

What are plant hormones? Plant hormones, also known as phytohormones, are substances that control the embryonic development and the growth of the adult plant.

Agro industrial-chelating agents, Chelating agents Oxalates: Only a ...

Chelating agents Oxalates: Only a few plants contain sufficient amounts of sodium and potassium oxalate to be considered toxic. Moreover, ruminants that consume these plants

Explain the aseptic technique - sub culturing, Explain the Aseptic Techniqu...

Explain the Aseptic Technique - Sub Culturing? Aseptic technique is a series of procedures used to prevent contamination of cultures and sterile culture media. It is one of the

Planning of diabetes counselling, Q. Planning of diabetes counselling? ...

Q. Planning of diabetes counselling? You have helped the client to find out various solutions to a problem and understand the coping skills, ensured support from the family  su

Explain the procedure for testing quality of water, Explain the Procedure f...

Explain the Procedure for Testing Quality of Water Using Presumptive Test? Now carry out the exercise following the steps indicated herewith. 1. Make 3 series of lactose bro

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