Amino Acids 8. The beta-pleated sheets secondary structure of Proteins

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This video looks in detail at the beta-pleated secondary structure of proteins. It uses animation to show intramolecular hydrogen bonds forming between the N-H of one amino acid and the C=O of another further along the chain. These bonds explain why the polypeptide should take on a twisted structure and maintain it.
This is one in a series of videos looking at the chemistry of amino acids and proteins. Other in the series look at: the structures of amino acids; the zwitterion and its amphoteric properties; the reactions of the amino acid glycine (2-aminoethanoic acid) with sodium hydroxide, sodium carbonate and aqueous copper (II) sulfate solution; formation of two different dipeptides by the condensation reactions of glycine and alanine; formation of the backbone structure of a polypeptide; fibrous proteins verses globular proteins; protein hydrolysis