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parispilling | 14:35 Fri 08th Feb 2008 | Science
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what are the 4 main structures of proteins in detail, giving examples of all four
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According to wikipedia....

* Primary structure - the amino acid sequence of the peptide chains.
* Secondary structure - highly regular sub-structures (alpha helix and strands of beta sheet) which are locally defined, meaning that there can be many different secondary motifs present in one single protein molecule.
* Tertiary structure - Three-dimensional structure of a single protein molecule; a spatial arrangement of the secondary structures.
* Quaternary structure - complex of several protein molecules or polypeptide chains, usually called protein subunits in this context, which function as part of the larger assembly or protein complex.
Do your own homework.

LS
-- answer removed --
Tertiary -eg myoglobin
Quaternary - eg haemoglobin

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