https://teaching.ncl.ac.uk/bms/wiki//api.php?action=feedcontributions&feedformat=atom&user=080529518The School of Biomedical Sciences Wiki - User contributions [en]2026-04-15T01:14:12ZUser contributionsMediaWiki 1.44.0https://teaching.ncl.ac.uk/bms/wiki//index.php?title=Protein&diff=685Protein2010-11-12T10:40:43Z<p>080529518: </p>
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<div>A protein is a biological molecule which is made up of [[Amino acid|amino acids]].&nbsp; The amino acids join together with peptide bonds to form a polypeptide chain. A protein can be made up of a single polypeptide chain or multiple polypeptides linked together.&nbsp; <br />
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Examples of proteins include [[Enzyme|enzymes]], [[Receptor|receptors]] and [[Hormone|hormones.]]&nbsp; They are found in evey form of life from viruses to bacteria, yeasts to humans.&nbsp; <br />
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A protein has several 'layers' of structure.&nbsp; The primary structure is the sequence of [[Amino acids|amino acids]].&nbsp; This is determined&nbsp;by the [[DNA|DNA]] sequence&nbsp;that encodes for&nbsp;that particular protein, called the gene.&nbsp; Secondary structure is the first level of protein folding.&nbsp;A protein can fold in two different ways or not at all.&nbsp; It can either fold as an [[Alpha-helix|alpha-helix or]] a [[Beta-sheet|beta-sheet]]&nbsp;depending on the sequence of amino acids.&nbsp; Tertiary structure relates to the protein function.&nbsp; If the tertiary structure is wrong then the protein is unlikely to function properly.&nbsp; Tertiary structure is held together by either hydrogen bonds or disulphide bridges depending o the amio acids present.&nbsp; Finally, if there are more than one peptide chains linked together to form a protein then you get a quarternary structure.</div>080529518https://teaching.ncl.ac.uk/bms/wiki//index.php?title=Protein&diff=679Protein2010-11-12T09:24:15Z<p>080529518: Created page with 'A protein is a biological molecule which is made up of amino acids.&nbsp; Examples of proteins include enzymes, receptors and [[Hormone|hor…'</p>
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<div>A protein is a biological molecule which is made up of [[Amino acid|amino acids]].&nbsp; Examples of proteins include [[Enzyme|enzymes]], [[Receptor|receptors]] and [[Hormone|hormones.]]&nbsp; <br />
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A protein has several 'layers' of structure.&nbsp; The primary structure is the sequence of [[Amino acids|amino acids]].&nbsp; Secondary structure is the first level of protein folding.&nbsp;A protein can fold in two different ways or not at all.&nbsp; It can either fold as an [[Alpha-helix|alpha-helix or]] a [[Beta-sheet|beta-sheet]]&nbsp;depending on the sequence of amino acids.&nbsp; Tertiary structure relates to the protein function.&nbsp; If the tertiary structure is wrong then the protein is unlikely to function properly.&nbsp; Tertiary structure is held together by either hydrogen bonds or disulphide bridges depending o the amio acids present.&nbsp; Finally, if there are more than one peptide chains linked together to form a protein then you get a quarternary structure.</div>080529518