@misc{indiciae20a121a34a2c,
  title = {Identical pentapeptides with different backbones.},
  author = {W Kabsch and C Sander},
  doi = {10.1038/317207a0},
  url = {https://pubmed.ncbi.nlm.nih.gov/4047161/},
  note = {Source identifier: 4047161}
}