Structural statistics of 6616 AMPs in the APD:
| Structural Class | Peptide Number | Percentage |
|---|---|---|
| Helix: | 998 | 15.08% |
| Beta structure: | 124 | 1.87% |
| Helix and beta unpacked: | 4 | 0.06% |
| Combine helix and beta packed: | 122 | 1.84% |
| Neither helix nor beta structure: | 46 | 0.70% |
| Rich in unusual aa: | 452 | 6.83% |
| Disulfide bridge (but no 3D): | 707 | 10.69% |
| Unknown 3D structure: | 4163 | 62.92% |
There are 546 peptides with known 3D structure in this database.
| The number of structures determined are: | |
| By NMR: | 480 |
| By X-Ray Diffraction: | 66 |