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Chemsheets AS006 (Electron arrangement)

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Presentation on theme: "Chemsheets AS006 (Electron arrangement)"— Presentation transcript:

1 Chemsheets AS006 (Electron arrangement)
21/04/2017 AMINO ACIDS © A Jul-12

2 AMINO ACIDS amine group carboxylic acid group
© A Jul-12

3 glycine © A Jul-12

4 alanine © A Jul-12

5 valine © A Jul-12

6 serine © A Jul-12

7 aspartic acid © A Jul-12

8 From nobelprize.org

9 amino acids are chiral (except glycine where R = H)
only one enantiomer occurs usually Public domain image from wikipedia

10 Low pH (acidic) Neutral pH High pH (alkaline)
© A Jul-12

11 Draw the structure of the amino acid at the pH shown.
© A Jul-12

12 Draw the structure of the amino acid at the pH shown.
© A Jul-12

13 Joining amino acids together to make polypeptides and proteins:
Condensation reaction: molecules join and water is eliminated © A Jul-12

14 Breaking down polypeptides and proteins into amino acids:
Needs: acid or enzyme Hydrolysis reaction: reaction with water in which O-H bond breaks © A Jul-12

15 Public domain image from wikipedia

16 Public domain image from wikipedia

17 Helix held in shape by hydrogen bonds
Public domain image from wikipedia Helix held in shape by hydrogen bonds

18 Public domain image from wikipedia

19 Public domain image from wikipedia

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