@misc{indiciaeaa162bbd7c2d,
  title = {Light-driven proton or chloride pumping by halorhodopsin.},
  author = {E Bamberg and J Tittor and D Oesterhelt},
  year = {1993},
  doi = {10.1073/pnas.90.2.639},
  url = {https://pubmed.ncbi.nlm.nih.gov/8380643/},
  note = {Source identifier: 8380643}
}