Structural statistics of 5069 AMPs in the APD:
| Structural Class | Peptide Number | Percentage |
|---|---|---|
| Helix: | 848 | 16.73% |
| Beta structure: | 109 | 2.15% |
| Helix and beta unpacked: | 4 | 0.08% |
| Combine helix and beta packed: | 123 | 2.43% |
| Neither helix nor beta structure: | 29 | 0.57% |
| Rich in unusual aa: | 245 | 4.83% |
| Disulfide bridge (but no 3D): | 658 | 12.98% |
| Unknown 3D structure: | 3053 | 60.23% |
There are 519 peptides with known 3D structure in this database.
| The number of structures determined are: | |
| By NMR: | 453 |
| By X-Ray Diffraction: | 66 |