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    Can anyone please tell me examples of Primary, Secondary, Teritary and Quaternary structure of poteins? Thanks
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    Primary structure is just the sequence of amino acids in a polypeptide, for example Glycine-Cysteine-Alanine (you don't actually need to know the names of any amino acids).

    Secondary structure is the way that hydrogen bonds cause the polypeptide to fold up in some specific structures - the main ones are the alpha helix and the beta pleated sheet.

    Tertiary structure is how these structures are folded up together to form the overall shape of the polypeptide - these can be caused by many other intermolecular forces such as disulphide bridges, hydrophobic interactions, and ionic bonds.

    Quaternary structure is the organisation of one or more polypeptides together to form a protein, possibly with the addition of a prosthetic group (a molecule other than a polypeptide). A common example of this is hemoglobin, which contains 4 polypeptides and 4 heme (prosthetic) groups.
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    primary..haemoglobin.
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    haemoglobin is globular by the way..
    collage is fibrous
 
 
 
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