Reference:
  Author: Steinegger, Martin; Söding, Johannes
  Title: Clustering huge protein sequence sets in linear time
  Journal: Nature Communications
  Year: 2018
  Volume: 9
  Number: 1 
  DOI: 10.1038/s41467-018-04964-5
  URL: "https://www.nature.com/articles/s41467-018-04964-5"
Other-References: "https://github.com/soedinglab/MMseqs2"
