| PDB | Chain | Name | Length | Cyclization | Rings | Disulfide | Type | Source | Method |
|---|---|---|---|---|---|---|---|---|---|
| 2JA8 | J;L | DNA-DIRECTED RNA POLYMERASE II LARGEST SUBUNIT | 70 | SS | 2 | - | Natural | Saccharomyces Cerevisiae | X-RAY DIFFRACTION |
| 2JM2 | A | INSULIN-LIKE GROWTH FACTOR-BINDING PROTEIN 6 | 45 | SS | 3 | 3 | Natural | Homo Sapiens | SOLUTION NMR |
| 2JM4 | A | RELAXIN RECEPTOR 1 | 43 | SS | 3 | 3 | Natural | Homo Sapiens | SOLUTION NMR |
| 2JMN | A | INSULIN A CHAIN | 21 | SS | 1 | 1 | Natural | Homo Sapiens | SOLUTION NMR |
| 2JNI | A | ARENICIN-2 | 21 | SS | 1 | 1 | Natural | Arenicola Marina | SOLUTION NMR |
| 2JNR | A | VIR165 | 20 | SS | 1 | 1 | Natural | Synthetic Construct | SOLUTION NMR |
| 2JP6 | A | POTASSIUM CHANNEL TOXIN ALPHA-KTX 18.1 | 37 | SS | 3 | 3 | Natural | Tityus Cambridgei | SOLUTION NMR |
| 2JQW | A | LECTIN-LIKE PEPTIDE | 17 | SS | 1 | 1 | Natural | Odorrana Grahami | SOLUTION NMR |
| 2JR3 | A | PELOVATERIN | 42 | SS | 3 | 3 | Natural | Pelodiscus Sinensis | SOLUTION NMR |
| 2JRW | A | CYCLIC EXTENDED PEP.1 | 23 | SS | 1 | 1 | Natural | Unknow | SOLUTION NMR |
| 2JRY | A | I-SUPERFAMILY CONOTOXIN R11A | 46 | SS | 4 | 4 | Non-natural | Conus Radiatus | SOLUTION NMR |
| 2JSB | A | ARENICIN-1 | 21 | SS | 1 | 1 | Natural | Arenicola Marina | SOLUTION NMR |
| 2JTB | A | HAINANTOXIN-3 | 33 | SS | 3 | 3 | Natural | Ornithoctonus Hainana | SOLUTION NMR |
| 2JTU | A | I-SUPERFAMILY CONOTOXIN R11A | 38 | SS | 4 | 4 | Non-natural | Unknow | SOLUTION NMR |
| 2JUE | A | KALATA-B1 | 29 | SS | 4 | 3 | Non-natural | Synthetic Construct | SOLUTION NMR |
| 2JUM | A | INSULIN A CHAIN | 21 | SS | 1 | 1 | Natural | Unknow | SOLUTION NMR |
| 2JUQ | A | ALPHA-CONOTOXIN RGIA | 13 | SS | 2 | 2 | Natural | Unknow | SOLUTION NMR |
| 2JUR | A | ALPHA-CONOTOXIN RGIA | 13 | SS | 2 | 2 | Natural | Unknow | SOLUTION NMR |
| 2JUS | A | ALPHA-CONOTOXIN RGIA | 13 | SS | 2 | 2 | Natural | Unknow | SOLUTION NMR |
| 2JUT | A | ALPHA-CONOTOXIN RGIA | 13 | SS | 2 | 2 | Natural | Unknow | SOLUTION NMR |
| 2JUU | A | INSULIN A CHAIN | 21 | SS | 1 | 1 | Non-natural | Unknow | SOLUTION NMR |
| 2JUV | A | INSULIN A CHAIN | 21 | SS | 1 | 1 | Non-natural | Unknow | SOLUTION NMR |
| 2JUY | A | NEOPETROSIAMIDE A | 28 | SS | 3 | 3 | Non-natural | Neopetrosia Sp | SOLUTION NMR |
| 2JV1 | A | INSULIN | 21 | SS | 1 | 1 | Natural | Homo Sapiens | SOLUTION NMR |
| 2JWG | A | VARIANT SURFACE GLYCOPROTEIN ILTAT 1.24 | 46 | SS | 2 | 2 | Natural | Trypanosoma | SOLUTION NMR |
| 2JWH | A | VARIANT SURFACE GLYCOPROTEIN ILTAT 1.24 | 48 | SS | 2 | 2 | Natural | Trypanosoma Brucei Brucei | SOLUTION NMR |
| 2JWM | A | KALATA-B7 | 29 | SS | 3 | 3 | Natural | Oldenlandia Affinis | SOLUTION NMR |
| 2JXZ | A | CALCITONIN | 33 | SS | 1 | 1 | Natural | Unknow | SOLUTION NMR |
| 2JYP | A | ARAGONITE PROTEIN AP7 | 36 | SS | 1 | 1 | Natural | Unknow | SOLUTION NMR |
| 2K10 | A | RANATUERIN-2CSA | 32 | SS | 1 | 1 | Natural | Rana Cascadae | SOLUTION NMR |
| 2K1I | A | MUCOSAL ALPHA-DEFENSIN | 32 | SS | 3 | 3 | Natural | Unknow | SOLUTION NMR |
| 2K1V | A | RELAXIN-3 | 22 | SS | 1 | 1 | Non-natural | Unknow | SOLUTION NMR |
| 2K2Y | A | CARBOXYPEPTIDASE INHIBITOR | 39 | SS | 3 | 3 | Natural | Rhipicephalus Bursa | SOLUTION NMR |
| 2K2Z | A | CARBOXYPEPTIDASE INHIBITOR | 39 | SS | 3 | 3 | Natural | Rhipicephalus Bursa | SOLUTION NMR |
| 2K4U | A | POTASSIUM CHANNEL TOXIN ALPHA-KTX 3.6 | 37 | SS | 3 | 3 | Natural | Mesobuthus Martensii | SOLUTION NMR |
| 2K6T | A | INSULIN-LIKE 3 A CHAIN | 26 | SS | 1 | 1 | Natural | Unknow | SOLUTION NMR |
| 2K6U | A | INSULIN-LIKE 3 A CHAIN | 27 | SS | 1 | 1 | Natural | Unknow | SOLUTION NMR |
| 2K72 | A | MATRIX METALLOPROTEINASE-23 | 37 | SS | 3 | 3 | Natural | Unknow | SOLUTION NMR |
| 2K7G | A | VARV PEPTIDE F | 29 | SS | 4 | 3 | Natural | Viola Arvensis | SOLUTION NMR |
| 2K91 | A | INSULIN | 21 | SS | 1 | 1 | Natural | Homo Sapiens | SOLUTION NMR |
| 2K9E | A | KAPPA-STICHOTOXIN-SHE3A | 38 | SS | 3 | 3 | Non-natural | Stichodactyla Helianthus | SOLUTION NMR |
| 2K9O | A | VM24 SCORPION TOXIN | 36 | SS | 4 | 4 | Natural | Unknow | SOLUTION NMR |
| 2K9R | A | INSULIN | 21 | SS | 1 | 1 | Natural | Homo Sapiens | SOLUTION NMR |
| 2KB8 | A | ISLET AMYLOID POLYPEPTIDE | 37 | SS | 1 | 1 | Natural | Homo Sapiens | SOLUTION NMR |
| 2KB9 | A | JAGGED-1 | 44 | SS | 4 | 4 | Natural | Unknow | SOLUTION NMR |
| 2KBC | A | INSL5_B-CHAIN | 22 | SS | 1 | 1 | Non-natural | Synthetic Construct | SOLUTION NMR |
| 2KCG | A | CYCLOVIOLACIN-O2 | 30 | SS | 3 | 3 | Natural | Viola Odorata | SOLUTION NMR |
| 2KCH | A | KALATA-B2 | 29 | SS | 4 | 3 | Natural | Oldenlandia Affinis | SOLUTION NMR |
| 2KDQ | A | L-22 CYCLIC PEPTIDE | 14 | H2T | 1 | - | Non-natural | Unknow | SOLUTION NMR |
| 2KEF | A | HEPCIDIN | 25 | SS | 4 | 4 | Natural | Homo Sapiens | SOLUTION NMR |