1) For some species, the SPTREMBL file was pulled in with the
       source_id of Swiss-Prot.

    2) The RefSeq DNA and peptide sources for microbat were confused
       (the peptide files had the source_id of RefSeq_dna).

    3) Same problem, but inversed, for yeast.

    4) RefSeq files for microbat were fetched from the wrong
       FTP directory at NCBI (vertibrate_other rather than
       vertibrate_mammalian).