let hg19 =
    let hg19_url =
      "ftp://gsapubftp-anonymous@ftp.broadinstitute.org/bundle/2.8/hg19/ucsc.hg19.fasta.gz" in
    let dbsnp_hg19_url =
      "ftp://gsapubftp-anonymous@ftp.broadinstitute.org/bundle/2.8/hg19/dbsnp_138.hg19.vcf.gz" in
    create Name.hg19
      ~metadata:"Provided by the Biokepi library"
      ~major_contigs:major_contigs_hg_family
      ~fasta:Location.(url hg19_url|> gunzip)
      ~dbsnp:Location.(url dbsnp_hg19_url |> gunzip)