| PDB | Chain | Name | Length | Cyclization | Rings | Disulfide | Type | Source | Method |
|---|---|---|---|---|---|---|---|---|---|
| 1RJI | A | POTASSIUM CHANNEL TOXIN KX | 31 | SS | 3 | 3 | Natural | Unknow | SOLUTION NMR |
| 1RKK | A | POLYPHEMUSIN I | 19 | SS | 2 | 2 | Natural | Synthetic Construct | SOLUTION NMR |
| 1RMK | A | MU-O-CONOTOXIN MRVIB | 31 | SS | 3 | 3 | Natural | Conus Marmoreus | SOLUTION NMR |
| 1RO3 | A | DISINTEGRIN ECHISTATIN | 49 | SS | 4 | 4 | Natural | Echis Carinatus | SOLUTION NMR |
| 1ROO | A | SHK TOXIN | 35 | SS | 3 | 3 | Natural | Stichodactyla Helianthus | SOLUTION NMR |
| 1RPB | A | TRICYCLIC PEPTIDE RP 71955 | 21 | SS | 2 | 2 | Natural | Actinomycete Sp9440 | SOLUTION NMR |
| 1RPC | A | TRICYCLIC PEPTIDE RP 71955 | 21 | SS | 2 | 2 | Natural | Actinomycete Sp9440 | SOLUTION NMR |
| 1RPQ | W;X;Y;Z | HIGH AFFINITY IMMUNOGLOBULIN EPSILON RECEPTOR ALPHA-SUBUNIT PRECURSOR | 21 | SS | 2 | - | Natural | Unknow | X-RAY DIFFRACTION |
| 1RRV | C;D | DESVANCOSAMINYL VANCOMYCIN | 7 | Sidechain | 3 | - | Non-natural | Amycolatopsis Orientalis | X-RAY DIFFRACTION |
| 1RYG | A | HAINANTOXIN-IV | 36 | SS | 3 | 3 | Natural | Unknow | SOLUTION NMR |
| 1RYV | A | HAINANTOXIN-IV | 36 | SS | 3 | 3 | Natural | Unknow | SOLUTION NMR |
| 1S6W | A | HEPCIDIN | 21 | SS | 4 | 4 | Natural | Unknow | SOLUTION NMR |
| 1S6X | A | KVAP CHANNEL | 34 | SS | 3 | 3 | Natural | Unknow | SOLUTION NMR |
| 1S8K | A | TOXIN BMKK4 | 31 | SS | 3 | 3 | Non-natural | Mesobuthus Martensii | SOLUTION NMR |
| 1SBW | I | PROTEIN (BETA-TRYPSIN) | 35 | SS | 1 | 1 | Natural | Vigna Radiata | X-RAY DIFFRACTION |
| 1SCO | A | SCORPION TOXIN OSK1 | 38 | SS | 3 | 3 | Natural | Orthochirus Scrobiculosus | SOLUTION NMR |
| 1SCY | A | SCYLLATOXIN | 32 | SS | 3 | 3 | Natural | Leiurus Quinquestriatus Hebraeus | SOLUTION NMR |
| 1SF1 | A | INSULIN A CHAIN | 21 | SS | 1 | 1 | Natural | Homo Sapiens | SOLUTION NMR |
| 1SFI | I | TRYPSIN | 14 | SS | 2 | 1 | Natural | Helianthus Annuus | X-RAY DIFFRACTION |
| 1SFO | J;L | RNA STRAND | 70 | SS | 2 | - | Natural | Saccharomyces Cerevisiae | X-RAY DIFFRACTION |
| 1SH1 | A | NEUROTOXIN I | 48 | SS | 3 | 3 | Natural | Stichodactyla Helianthus | SOLUTION NMR |
| 1SHI | A | NEUROTOXIN I | 49 | SS | 3 | 3 | Natural | Stichodactyla Helianthus | SOLUTION NMR |
| 1SIS | A | SCORPION INSECTOTOXIN I5A | 36 | SS | 4 | 4 | Natural | Mesobuthus Eupeus | SOLUTION NMR |
| 1SJT | A | PROINSULIN | 21 | SS | 1 | 1 | Natural | Homo Sapiens | SOLUTION NMR |
| 1SKI | A | CYCLIC HEXAPEPTIDE RRYYRF | 6 | H2T | 1 | - | Natural | Unknow | SOLUTION NMR |
| 1SKK | A | CYCLIC HEXAPEPTIDE KKWWKF | 6 | H2T | 1 | - | Natural | Unknow | SOLUTION NMR |
| 1SKL | A | CYCLIC HEXAPEPTIDE RR(NAL)(NAL)RF | 6 | H2T | 1 | - | Non-natural | Unknow | SOLUTION NMR |
| 1SLD | P | STREPTAVIDIN | 8 | SS | 1 | 1 | Natural | Unknow | X-RAY DIFFRACTION |
| 1SLE | M;P | STREPTAVIDIN | 10 | SS | 1 | - | Natural | Unknow | X-RAY DIFFRACTION |
| 1SMF | I | TRYPSIN | 22 | SS | 1 | 1 | Natural | Unknow | X-RAY DIFFRACTION |
| 1SOP | A | MINI-COLLAGEN | 26 | SS | 3 | 3 | Natural | Unknow | SOLUTION NMR |
| 1SP7 | A | MINI-COLLAGEN | 24 | SS | 3 | 3 | Natural | Unknow | SOLUTION NMR |
| 1SRB | A | SARAFOTOXINS PRECURSOR | 21 | SS | 2 | 2 | Natural | Atractaspis Microlepidota Andersoni | SOLUTION NMR |
| 1SSL | A | HEPATOCYTE GROWTH FACTOR RECEPTOR | 48 | SS | 4 | 4 | Natural | Homo Sapiens | SOLUTION NMR |
| 1SSZ | A | PULMONARY SURFACTANT-ASSOCIATED PROTEIN B | 34 | SS | 2 | 2 | Natural | Homo Sapiens | INFRARED SPECTROSCOPY |
| 1SXM | A | NOXIUSTOXIN | 40 | SS | 3 | 3 | Natural | Centruroides Noxius | SOLUTION NMR |
| 1T0W | A | HEVEIN | 33 | SS | 3 | 3 | Natural | Unknow | SOLUTION NMR |
| 1T1K | A | INSULIN | 21 | SS | 1 | 1 | Natural | Unknow | SOLUTION NMR |
| 1T1P | A | INSULIN | 21 | SS | 1 | 1 | Natural | Unknow | SOLUTION NMR |
| 1T1Q | A | INSULIN | 21 | SS | 1 | 1 | Natural | Unknow | SOLUTION NMR |
| 1T34 | H | ATRIAL NATRIURETIC PEPTIDE RECEPTOR A | 21 | SS | 1 | 1 | Natural | Unknow | X-RAY DIFFRACTION |
| 1T7D | C;D | SIGNAL PEPTIDASE I | 6 | Sidechain | 1 | - | Non-natural | Streptomyces Tu | X-RAY DIFFRACTION |
| 1T9E | A | TRYPSIN INHIBITOR 1 | 14 | H2T | 1 | - | Non-natural | Helianthus Annuus | SOLUTION NMR |
| 1TCG | A | MU-CONOTOXIN GIIIA | 23 | SS | 3 | 3 | Non-natural | Unknow | SOLUTION NMR |
| 1TCH | A | MU-CONOTOXIN GIIIA | 23 | SS | 3 | 3 | Non-natural | Unknow | SOLUTION NMR |
| 1TCJ | A | MU-CONOTOXIN GIIIA | 23 | SS | 3 | 3 | Non-natural | Conus Geographus | SOLUTION NMR |
| 1TCK | A | MU-CONOTOXIN GIIIA | 23 | SS | 3 | 3 | Non-natural | Conus Geographus | SOLUTION NMR |
| 1TER | A | TERTIAPIN | 22 | SS | 2 | 2 | Natural | Apis Mellifera | SOLUTION NMR |
| 1TI5 | A | PLANT DEFENSIN | 46 | SS | 4 | 4 | Natural | Vigna Radiata | SOLUTION NMR |
| 1TK2 | B | SUBTILISIN SAVINASE | 10 | H2T | 1 | - | Non-natural | Brevibacillus Brevis | X-RAY DIFFRACTION |