BMS1041 amino acids

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1. Desmosine is an AA...

  • formed of four glycine residues
  • formed of four hydroxyproline residues
  • formed of four hydroxylysine residues
  • formed of four lysine residues
  • formed of four hydroxyproline and hydroxylysine residues
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2. The amino acids with polar uncharged R groups are characterised by:

  • uncharged acidic groups
  • polar, uncharged groups in the side chains which can form H bonds eg OH, SH, C=O
  • uncharged basic groups
  • polar, charged groups in the side chains which can form H bonds eg OH, SH, C=O

3. Amongst AA's commonly found in proteins Glycine is unique as:

  • high concs are not found in alpha helices
  • it does not contain a chiral alpha carbon
  • the side chain contains only one hydrogen
  • all the things
  • it is commonly found in beta turns

4. Which component of the general structure of AA is acidic?

  • H
  • R-group
  • COO-
  • NH3+

5. The amino acids with 'acidic R groups' are characterised by?

  • side chains with a negative physiological pH
  • side chains with a positive physiological pH
  • the AA's aspartate and glutamate. The negatively charged side chains can form electrostatic interactions with positively charged basic side chains.
  • the AA's lysine and arginine. The negatively charged side chains can form electrostatic interactions with positively charged basic side chains

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