@article{altschul1997,
  title={Gapped BLAST and PSI-BLAST: a new generation of protein database search programs},
  author={Stephen F. Altschul},
  year={1997},
  journal={Nucleic Acids Research},
  doi={10.1093/nar/25.17.3389},
  url={https://doi.org/10.1093/nar/25.17.3389}
}