@misc{indiciaeb2c476e6638f,
  title = {Mutations define essential and nonessential U2 RNA structures.},
  author = {M Ares and A H Igel},
  year = {1990},
  doi = {10.1007/bf00360444},
  url = {https://pubmed.ncbi.nlm.nih.gov/2194105/},
  note = {Source identifier: 2194105}
}