Structural statistics of 6588 AMPs in the APD:
| Structural Class | Peptide Number | Percentage |
|---|---|---|
| Helix: | 997 | 15.13% |
| Beta structure: | 124 | 1.88% |
| Helix and beta unpacked: | 4 | 0.06% |
| Combine helix and beta packed: | 122 | 1.85% |
| Neither helix nor beta structure: | 44 | 0.67% |
| Rich in unusual aa: | 452 | 6.86% |
| Disulfide bridge (but no 3D): | 704 | 10.69% |
| Unknown 3D structure: | 4141 | 62.86% |
There are 543 peptides with known 3D structure in this database.
| The number of structures determined are: | |
| By NMR: | 477 |
| By X-Ray Diffraction: | 66 |