Site Loader
Get a Quote
Rock Street, San Francisco

Task 3
Haemoglobin is a globular protein which transfers oxygen to the lungs to the tissues and conveys CO2 at the tissues back to the lungs. In order for it to work successfully, haemoglobin requires to join to O2 when the oxygen intensity is elevated in the lungs and be capable to discharge O2 quickly in the depleted limited pressure in the tissues. The haemoglobin particle contains 4 polypeptide chains. In the haemoglobin there’s an extensive sort of amino acid components. All four polypeptide chains transport a haem group that can bind to oxygen and all four components must be present to form haemoglobin. Amino acids excesses are found at the exterior of a polypeptide chain. The prosthetic group of a protein is a firmly enclosed non-protein unit that is important for the physical and operational durability of the haemoglobin. The form of the haemoglobin affects its capability to carry oxygen and move freely throughout the circulatory system. Haemoglobin bends with the hydrophobic surface on the interior and the hydrophilic surface on the exterior. The structure of haemoglobin contains 4 polypeptide sub-components. The first two are alpha-polypeptide chains and the other two are beta polypeptide chains. The 4 sub-components shapes a haemoglobin particle that is water dissolvable. It can move about in the blood. Haemoglobin contains polypeptide chains that are bent in a globular form because of hydrophobic connections among the hydrophobic R groups. Red blood cells turn into biconcave circles that can easily move round the body and merge together with oxygen. The presence of a prosthetic group called Haem in the structure of haemoglobin means that oxygen can join to iron. The 3D figure of haemoglobin particle is very vital to its function. Its 3D figure is spun up into globules. Hydrophilic R groups are positioned round the exterior of the particle that lets the haemoglobin to combine with the liquid state inside blood. A prosthetic haem group is joined to all polypeptide chain with an iron (II) ion. Every iron (II) ion can fuse with one oxygen molecule.

Collagen is a fibrous protein containing 3 polypeptide chains twisted round together so its 3D feature is to produce fibres. Collagen’s functions are quite different from haemoglobin. Strong bunches of collagens which are collagen fibres that are a vital factor of the extra-cellular tissue that helps the majority of tissues and offers cells arrangement from the exterior. There are more roles for collagen like developing the arrangement of bones creating cartilage and connective tissue and stopping blood to being pushed at great pressure from overflowing the sides of the arteries. Collagen also appear in some cells because it has excellent ductile power this power is enlarged by collagen particles making additional sequences with other collagen particles and forming cross links which are staggered beside the collagen particles both amplifying strength and creating a fibril. They are the key component for: fascia, cartilage, ligaments, tendons, bone and teeth. Collagen consists of 3 polypeptide chains twisted round together and 35% of collagen’s structure is glycine. Collagen isn’t soluble in water because it wouldn’t be capable to offer help then ait would continuously disperse. Collagen’s structure contains 3 filaments of protein fused simultaneously amongst the chains with H-H bonds and then coiled into a helix which is called collagen helix. The structure of collagen protein subunits is a helical chain. Due to the ways in which the amino acids are arranged the protein can be hydrophobic or hydrophilic. The arrangement of collagen contains 3 spiral helices coiled into a circular coil. Three of the helical polypeptides are twisted over each one and attached through H-H bonds. The triple-strand particles flow corresponding to others plus disulfide cross-links among the R bands of lysine and keeps the particles jointly making fibres. Collagen holds polypeptide chains arranged in long strands or sheets. The multiple helix arrangement of collagen provides the structural power and so the role of collagen is to offer mechanical power in various parts.

We Will Write a Custom Essay Specifically
For You For Only $13.90/page!


order now

We Will Write a Custom Essay Specifically
For You For Only $13.90/page!


order now

Reference:
https://alevelnotes.com/notes/biology/biological-molecules/biological-molecules/protein-structure
https://revisionworld.com/gcse-revision/biology/cell-activity/proteins-and-amino-acids/globular-and-fibrous-proteins
http://www.markedbyteachers.com/as-and-a-level/science/explain-how-the-structure-of-collagen-and-haemoglobin-are-related-to-their-function.html
https://bodytomy.com/structure-of-hemoglobin
http://chemistry.elmhurst.edu/vchembook/568globularprotein.html
Collagen Vs. Haemoglobin
http://sevendaysperweek.blogspot.com/2015/10/stpm-biology-biological-molecules-part_4.html

Post Author: admin

x

Hi!
I'm Lillian

Would you like to get a custom essay? How about receiving a customized one?

Check it out
x

Hi!
I'm Camille!

Would you like to get a custom essay? How about receiving a customized one?

Check it out