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

What are stomata, What are stomata? How do these structures participate in ...

What are stomata? How do these structures participate in the plant transpiration? Stomata (singular, stoma) are small specialized passages for water and gases there in the epid

Explain valacyclovir, Valacyclovir (Valtrex) - Valacyclovir is an L-val...

Valacyclovir (Valtrex) - Valacyclovir is an L-valyl ester of acyclovir that is metabolized to acyclovir after oral administration, resultingin higher serum concentrations than

Visualize patient ductus arteriosus, Q. Visualize Patient Ductus Arteriosus...

Q. Visualize Patient Ductus Arteriosus? Best view to visualize a patient ductus arteriosus is high parasternal or ductal view. A patient ductus arteriosus in this view is see

Calculate the volume of a 25% urethane solution, Assume that the blood volu...

Assume that the blood volume of a rabbit is 0.5 liters. If the effective dose of the anesthetic urethane is 10 micrograms/mL, calculate the volume of a 25% urethane solution that m

Explain nutrient requirement and dietary management, Explain Nutrient Requi...

Explain Nutrient Requirement and Dietary Management? You must have understood by the discussion above that by the end of the flow phase, the patient usually is well hydrated an

What is the antagonism of the sympathetic, What is the antagonism between t...

What is the antagonism between the sympathetic and the parasympathetic neural actions? In general the actions of the sympathetic and the parasympathetic are antagonistic, i.e.,

Concepts of epidemic disease and endemic disease, Q. What is the difference...

Q. What is the difference between the concepts of epidemic disease and endemic disease? The Endemic diseases are those that often affect people of a given place, many or few in

Teratogens, TER A T OGEN S - These are chemicals or drugs causin...

TER A T OGEN S - These are chemicals or drugs causing malformed foetus . The production of monsters or malformed foetus is called tertogeny or teratogenesis . Th

Measures of evenness, Measures of Evenness The maximum Shannon-Wiener i...

Measures of Evenness The maximum Shannon-Wiener index for a given number of species can be calculated as: The minimum Shannon-Wiener index for a given data set can be c

Explain about mental foramen and nerve, Explain about Mental foramen and ne...

Explain about Mental foramen and nerve Mental foramen is a strategically important landmark during osteotomy procedures. Its location and the possibility that an anterior loop

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