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

Define foods effect on drug transport, Define Foods Effect on Drug Transpor...

Define Foods Effect on Drug Transport? Many drugs are transported in blood bound lo plasma proteins. Severe malnutrition or diseases affecting the synthesis of plasma proteins

Effects of long term malnutrition, Effects of long term malnutrition ...

Effects of long term malnutrition The effects of long term malnutrition are more severe in children. Children do not have sufficient amounts of carbohydrates and fats in

What are the cytokinins, What are the cytokinins? And where are they made? ...

What are the cytokinins? And where are they made? The Cytokinins are phytohormones active in the promotion of cellular division they slow down the aging of tissues and act toge

Define the assessment of copper status in humans, Define the Assessment of ...

Define the Assessment of Copper Status in Humans? A reliable index to assess marginal copper status is currently not available. However, severe copper deficiency may be detecte

Disease prevention for the high risk group, Disease Prevention for the High...

Disease Prevention for the High Risk Group   Interventions aimed at early diagnosis and appropriate management for reducing morbidity and mortality targeting people who suffer

Opium and morphine, OPIUM - Opium is milky latex obtained by incisin...

OPIUM - Opium is milky latex obtained by incising the unripe capsule of white poppy ( Papave r somniferum family paprarecea) It has eaten or smoke. Generally it

What are the benefits of migration, What are the Benefits of migration ...

What are the Benefits of migration Eg: Need to leave Alaska due to harsh weather conditions (statement that birds are escaping NZ winter not acceptable). Longer day

How the brain influences or controls immune system, How the brain influence...

How the brain influences or controls immune system Scientists are still working to determine to what degree, and how, the brain influences or controls immune system functions,

What is the main theory opposed to evolution?, What is the main theory oppo...

What is the main theory opposed to evolution? The major theory that opposes the evolution theory on the explanation of how species emerged (phylogenesis) is fixism.

What is the average number of minutes a cell, You have 200 cells and find 1...

You have 200 cells and find 120 in interphase, 57 in prophase, 8 in prometaphase, and 5 in metaphase, 8 in anaphase and 2 in telophase. (None in G0 phase). it takes 18 hours to com

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