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

Clinic blood pressure management, Raised blood pressure is a major risk fac...

Raised blood pressure is a major risk factor for cardiovascular disease. The higher the blood pressure, the higher the risk of stroke, coronary heart disease, kidney disease, heart

Salts responsible for the cellular osmotic regulation, Q. What are the majo...

Q. What are the major mineral salts responsible for the cellular osmotic regulation? The main ions that act in the regulation of the osmotic pressure in tissues and cells are t

Determine the principles of bcc, Determine the Principles of BCC BCC ...

Determine the Principles of BCC BCC should be integrated with program goals from the starting. BCC is a necessary part of diabetes prevention, care and support programs, and

The principal nitrogenous excretory in humans, The principal nitrogenous ex...

The principal nitrogenous excretory compound in humans is synthesised: 1. in kidneys but eliminated mostly through liver 2. in kidneys as well as eliminated by kidneys 3.

Explain the reduction in free radical generation - vitamin e, Explain the R...

Explain the Reduction in free radical generation - Vitamin E? 1) Reduction in free radical generation: Vitamin E acts synergistically with selenium thereby reducing susceptibil

Bacteria and archea, Based on the scientific name. Streptococcus agalactia...

Based on the scientific name. Streptococcus agalactiae what morphology would you expect these cells to have?

Which germ layer originate liver and the pancreas, Q. From which germ layer...

Q. From which germ layer do the liver and the pancreas originate? What are other organs and tissues made from that germ layer? The pancreas and the liver are originated from th

Low protein products, Foods with moderate amounts of protein can be eaten i...

Foods with moderate amounts of protein can be eaten in limited amounts. These foods include grains, bread, pasta, rice, potatoes, corn, and peas. Foods with little or no protein ar

Describe dextran , Dextran is a glucose polymer where the glucose re...

Dextran is a glucose polymer where the glucose residues are mainly related by α1-6 bonds. Moreover, a few branches also happen. These are classically formed by α1-2, α1-3 or α1-4 b

Fallopian tube, Fallopian tube: There are two fallopian tubes connec...

Fallopian tube: There are two fallopian tubes connected to the uterus one on each side of it. The ovum released from the ovarian follicle enters the fallopian tube. Th

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