| Domain Structure | Page 1 |
| Hydrogen Bonds | Page 2 |
| Hydrogen Bonding in an Alpha-Helix | Page 3 |
| Hydrogen Bonding in a Beta-Hairpin | Page 4 |
| Faces of a Beta-Sheet | Page 5 |
| Multi-centered H-Bond | Page 6 |
| The Two Beta-Sheets | Page 7 |
| Methionines | Page 8 |
| Charged Amino Acids: Ion Pairs | Page 9 |
| Glycines | Page 10 |
| Prolines | Page 11 |
| Valine, Isoleucine & Leucine | Page 12 |
| Phenylalanines | Page 13 |
| Tyrosines | Page 14 |
1aqt (PDB)
Uhlin, U., Cox, G. B., Guss, J. M.: Crystal structure of the epsilon subunit of the proton-translocating ATP synthase from Escherichia coli. Structure 5 pp. 1219 (1997) (PubMed)