@misc{indiciae39f8f53873b3,
  title = {Bacillus subtilis pur operon expression and regulation.},
  author = {D J Ebbole and H Zalkin},
  year = {1989},
  doi = {10.1128/jb.171.4.2136-2141.1989},
  url = {https://pubmed.ncbi.nlm.nih.gov/2495272/},
  note = {Source identifier: 2495272}
}