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

Indications for surgery-aortic valve disease, Indications For Surgery :...

Indications For Surgery :  The normal aortic valve area in the adult is about 3-4 cm2. Significant symptoms occur when the valve area is seduced to 1/4"' the normal area

Describe the external features of the heart, Question 1 Describe the exter...

Question 1 Describe the external features of the heart. Add a note on circulation of blood within the heart Question 2 Discuss the major joints of thorax and pelvis Quest

Stress of hospitalization, STRESS OF HOSPITALIZATION   Stress refers to...

STRESS OF HOSPITALIZATION   Stress refers to the imbalance between the environmental  and societal demands and the child's coping abilities  and resources that puts  them in a

Primary tissues, what do primary tissues of a plant do

what do primary tissues of a plant do

What is the probability of a carrier of the recessive allele, Two parents w...

Two parents who are each known to be carriers of an autosomal recessive alleles have four children. None of the children has the recessive condition. What is the probability that o

Define mechanisms for antinutritional effect on human, Define mechanisms fo...

Define mechanisms for antinutritional effect on Human? There are several possibilities: reduced availability of amino acids to cancer cells by reversing the carcinogen-induced

Explain in detail about the term behavioural neuropsychology, Explain in de...

Explain in detail about the term behavioural neuropsychology Behavioural neuropsychology has been explained as 'the application of behaviour therapy techniques to problems of o

Describe the nutritional and functional role of manganese, Minerals :- Mang...

Minerals :- Manganese Food Source      Whole grains, fruits, vegetables Nutritional Functional role Essential nutrient: Deficiency extremely rare. Enzyme cofactor

What are the physical properties of tear film, What are the physical proper...

What are the physical properties of Tear Film? Physical Properties of Tear Film: The tear film is a three-layered structure as given below: 1) Outermost Layer: Lipid Layer

Gene pool, Natural selection can therefore mean differential reproduction a...

Natural selection can therefore mean differential reproduction among members of the sarne gene pool. We earlier said that selection would promote those alleles that give rise to ph

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