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

Which equipments are required for stress laboratory, The stress lab must ha...

The stress lab must have the following equipment: 1) A mercury Blood Pressure apparatus. 2) A Bed so that the patients ECG can be recorded in the recovery period in supine po

Chain termination method, An incubation  combination  is set up having  the...

An incubation  combination  is set up having  the single-stranded  DNA template, DNA polymerase  I, the primer and all 4 deoxyribonucleoside triphosphates (dTTP, dGTP, dCTP, dATP),

Classification of multicellular animals - coelom, Classification of Multice...

Classification of Multicellular Animals - Coelom We know earlier that the pseudocoel gave animals specific selective benefits. Among other things, this fluid-tilled space wor

Define about the glutathione peroxidases - selenium, Define about the Gluta...

Define about the Glutathione peroxidases - Selenium? The role of selenium in the cytosolic enzyme, glutathione peroxidase (GSHPx), was first illustrated in 1973. Four selenium

Explain alginate, Alginate Alginates are produced by brown seaweeds (Ph...

Alginate Alginates are produced by brown seaweeds (Phaeophyceae, mainly  Laminaria).  Alginates or algin, is a generic term for the salts and derivatives of alginic acid. Algin

Mechanism of enzyme action, Mechanism  of Enzyme Action  The action of...

Mechanism  of Enzyme Action  The action of enzymes is to lower  the activation energy  or threshold  of their substrates which. Therefore  become  activated and   react  with

Effects of long term malnutrition on children, Effects of long term malnutr...

Effects of long term malnutrition on children The effects of long time malnutrition are more severe in children. Unlike adults children do not have sufficient amounts of c

Explain the classification of enzymes, Classification of Enzymes It has...

Classification of Enzymes It has been a long tradition  of giving enzymes names ending in 'ase'. The only major exception to this 'ase' is the proteolytic enzymes, whose names

Agro industrial-proteins, Proteins Protease inhibitors: Protease inh...

Proteins Protease inhibitors: Protease inhibitors are protein-based substances widely distributed within the plant kingdom, including the seeds of most cultivated legumes wh

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