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4294249
Structure and function in proteins
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Mind Map on Structure and function in proteins, created by c.lee4737 on 11/01/2016.
Mind Map by
c.lee4737
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Resource summary
Structure and function in proteins
Globular Proteins
Haemoglobin
Ball shaped molecule
Soluble in water
Contains many R groups containing hydrophilic side chains on the outside of the 'ball'
Insulin
Shape allows it to form bonds with other protein molecules
In the membranes of liver cells
Complementary shape
Respond by setting off a sequence of events
Culminates in the joining of glucose molecules to cause glycogen
Enzymes
Active site
Precise shape that allows the enzyme to bind with other molecules
Causing a reaction
Fibrous Proteins
Long, thin, molecules
Keratin
Found in hair, wool, nails and skin
Keratin forms long molecules that coil
These associate with each other
To form filaments
Very strong
Held together by disulphide bridges
Chains of amino acids
Regular pattern of hydrogen bonds
Causes them to coil into long helices
Insoluble
Structural roles
Collagen
Gives bone and cartilage strength
3 twisted polypeptide chains
More tightly bound than Keratin
Can form more rigid structures
Often grouped together to from almost rigid rods
Simple Protein Strucutre
Primary Structure
Secondary Strucutre
Tertiary Structure
Quaternary Structure
The function of a protein depends on its 3D shape.
The 3D shape is determined by its primary structure
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