1. Supersecondary Structure

2. Sidechain - Sidechain interactions

4. Topology Diagrams Page 24

5. Hairpin Loops Page 21

6. Alpha – Beta Structures Page 24

7. Helix – Loop – Helix Page 25

8. Calcium Binding Motif Page 25

9. Calcium Binding Motif Page 26

10. Coiled – coil structure Two alpha helices are intertwined and coil around each other Page 35

11. Coiled-coil alpha helix Page 36

12. Stabilization of a coiled-coil Page 37

13. Domains and Quaternary Structure

14. Four Helix Bundle Page 38

15. Examples of four helix bundles Page 38

16. The globin domain Page 40

17. Tyrosyl-tRNA synthetase domain structure Page 59

18. Influenza virus neuraminidase domains Page 71

19. Neuraminidase is a tetramer Page 72