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

Elaborate the term - gill slits, Elaborate the term - Gill slits. Later...

Elaborate the term - Gill slits. Lateral opening in the wall of pharynx which allows water to enter into mouth and exit through the pharynx. This is one of the ancestral charac

Risk assessment of biological hazards, Risk Assessment of Biological Hazard...

Risk Assessment of Biological Hazards Biological hazards of concern to public health include pathogenic strains of bacteria, viruses, helminths, protozoa, algae and certain tox

How sugar is used in meringues, How sugar is used in Meringues? Egg whi...

How sugar is used in Meringues? Egg whites beaten for a meringue hold air bubbles as the mechanical action of the beaters partly coagulates the egg protein. Sugars make the pro

Explain the criteria for assessment of folate status, Explain the Criteria ...

Explain the Criteria for Assessment of Folate Status Red cell folate, continues to be used as an important index of folate status. It is suggested that adequate folate status i

Phytochrome - floral induction, Phytochrome - Floral Induction Phytoch...

Phytochrome - Floral Induction Phytochrome a pigment that exists in two different inter convertible forms was discovered by Hendricks and Borthwrick et. al. and was chemically

Who are atopic individuals, Atopic individuals are those who are having abn...

Atopic individuals are those who are having abnormal high levels of circulating IgE and more than normal number of oesinophils.

Census, CENSUS - Counting by government of each decade is called census...

CENSUS - Counting by government of each decade is called census. POPUL A TIO N OF WORLD - In 2000 - 6.1 billion. In children birth per day - 3,36,960 Popu

Phylum colentrata, In phylum colenterata if tissues are present in the body...

In phylum colenterata if tissues are present in the body of an organism then why organs are not present as group of tissues makes an organuestion..

Ultrasonography, Ultrasonography: Ultrasounds are sound waves wit...

Ultrasonography: Ultrasounds are sound waves with a frequency of higher than the upper range of human hearing i.e., approximately 20,000 cycles per second (20 kilohertz).

Are there living beings without cells, Q Are there living beings without ce...

Q Are there living beings without cells? Viruses are considered the only living beings that do not have cells. Viruses are constituted by genetic material RNA or DNA enwrapped

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