Haem group, Biology

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.

Posted Date: 1/15/2013 7:51:57 AM | Location : United States

Related Discussions:- Haem group, Assignment Help, Ask Question on Haem group, Get Answer, Expert's Help, Haem group Discussions

Write discussion on Haem group
Your posts are moderated
Related Questions
What is Congenital Heart Operations And Interventions Aftercare of the children who have undergone cardiac procedures and surgeries is as important, and in some occasions, more

Explain Functional property of  WaterBinding/ Hydration Mode of action  Proteins can help reduce formula costs as the proteins hold additional water. Food system

Explain Energy requirement during tuberculosis Energy  :  The criteria to establish  the energy intake is the body weight status coupled with the rise  in body temperature. Con

Extensive factor of Luria Nebraska procedure Extensive factor analytic studies have been accomplished, and the factor structure of each of the major scales has been recognized.

uses of conductometry in biological experiments

Q. What are some examples of interspecific competition? Instance of interspecific competition are the dispute among worms, vultures, flies and microorganisms for carrion and th

what is the fate of corpus luteum if egg gets fertilised ?

Q. What is mitral stenosis? Most common cause of mitral stenosis is rheumatic fever. Nearly 30 per cent of patients with rheumatic fever may go on to develop pure mitral valve

Name the Foods to avoid  in soft diet include: Fried foods and nuts, rich pastries and desserts, Raw  vegetables, Heavily spiced foods, Gas-forming vegetables, S

bloodpressure will be more in _ in than in_