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Definitions:
ANABOLIC- Joining of small
molecules
CATABOLIC- Breaking larger
molecules in to smaller ones
PROTEINS/AMINO ACIDS…read more

Slide 3

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PRIMARY STRUCTURE
= The sequence of amino acids out of a possible
20 combinations.
>A polypeptide chain containing 20 amino
acids linked in any order and in any proportion
Has an infinite number of possible structures.
>Change of one amino acid will change whole
chain's properties/role.…read more

Slide 4

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SECONDARY STRUCTURE
= The coiling or folding of polypeptide chains in
to:
Beta Pleated Sheet (if folded)
Alpha helix (if coiled)
Held by H+ bonds.
Bonds are Dipole.
Require high temp or PH change to break…read more

Slide 5

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TERTIARY STRUCTURE
=Where an amino acid recoils in to a precise
shape
>Held by H+ bonds which lay between amino
acids and are close together
Stabalised by:
Ionic Bonds
-Electrons donated and
accepted
Disulphide Bridges
Between cysteine molecules
Hydrophobic interations
With R groups…read more

Slide 6

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QUATERNARY STRUCTURE
=Final structure where 2 or more tertiary
proteins are held together
*Not in all proteins
>Can include non-amino acid parts
>Will only form if all subunits present
(eg- haem in haemoglobin and nucleotide in
DNA)
>Stabilised by the bonds in tertiary stucture…read more

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