@misc{indiciae6cb77fea6d32,
  title = {Diphtheria toxin subunit active in vitro.},
  author = {R J Collier and H A Cole},
  year = {1969},
  doi = {10.1126/science.164.3884.1179},
  url = {https://pubmed.ncbi.nlm.nih.gov/4305968/},
  note = {Source identifier: 4305968}
}