Structural statistics of 6676 AMPs in the APD:
| Structural Class | Peptide Number | Percentage |
|---|---|---|
| Helix: | 1007 | 15.08% |
| Beta structure: | 124 | 1.86% |
| Helix and beta unpacked: | 4 | 0.06% |
| Combine helix and beta packed: | 126 | 1.89% |
| Neither helix nor beta structure: | 47 | 0.70% |
| Rich in unusual aa: | 453 | 6.79% |
| Disulfide bridge (but no 3D): | 707 | 10.59% |
| Unknown 3D structure: | 4208 | 63.03% |
There are 553 peptides with known 3D structure in this database.
| The number of structures determined are: | |
| By NMR: | 486 |
| By X-Ray Diffraction: | 67 |