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Revision ­ Proteins

Proteins are made from long chains of amino acids
A dipeptide is formed when 2 amino acids join together.
A polypeptide is when more than 2 amino acids join together.
Proteins are made from one or more polypeptides.

Different amino acids have a different variable group
All…

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Secondary structure ­ Polypeptide H
chain doesn't remain flat and straight. el
H-bonds form between amino acids in d
the chain, making it coil into a -helix or t…

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Tertiary structure ­ The coiled and Io
folded amino acid chains are coiled and ni
folded further. More bonds form c
between parts of the polypeptide in
chain. t
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d
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Quaternary structure ­ Some proteins Influenced by all the bonds mentioned above.
are made of several different
polypeptide chains held together by
bonds. The quaternary structure is the
way these polypeptide chains are
assembled together.

Collagen
Collagen is a fibrous protein which is used as supportive tissue in…

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