Fibrous And Globular Protiens Flashcards
What is a fibrous protein (adjectives)? 4
Relatively long
Strong
Insoluble
Structural role in organisms
What does the animo acid contain for fibrous proteins to be insoluble?
Non-polar R group
What do the polypeptide chains do for the proteins to become a strong fibre?
Polypeptide are wound up with each other and grouped in multiple layers to become strong fibre.
In the polypeptide chain of fibrous proteins what makes the amino acid special?
Repeating sequence of amino acids
What are the three fibrous proteins?
Collagen
Keratin
Elastin
Where is collagen found in, in the body? 3
Tendons
Artery wall
Bones
(collagen) uses of collagen in artery walls?
Can withstand high pressure because collagen fibres are strong
(Collagen) what are the uses of collagen in tendons? 🩻
They attach the mucles to bones allowing skeleton to move
(Collagen) uses of collagen in bones?
Very strong and tough
What are the uses of keratin? 1 1/2
Fingernails
Hooves
What is the important primary structure in keratin making it tough and hard?
Polypeptide contains high amounts of cysteine animo acid…
What do the cysteine amino acid do in polypeptide chain when bonded with another?
They form disulphide bridges which are very stong, tough and resistant.
Uses of elastin in body? 3
Lungs
Bladder
Blood vessels
Why is elastin helpful in lungs, bladder, blood vessels?
Lungs- allowing lungs to inflate and deflate for ventilation
Bladder- expand to hold urine
Blood vessels- maintain blood pressure by stretching and recoiling
