How to get good fungal and bacterial identifications from GenBank sequences
GenBank from the NCBI is an amazing and invaluable resource for DNA sequences, and combined with the searching tool BLAST it is really easy to identify your unknown gene sequence.
The trouble is that many of the organism identifications of GenBank sequences are dubious, outdated, or just plain wrong. Identifying a sequence as the wrong species is just bad science no matter what your reason, but is especially important for regulatory agencies. The problem of incorrect identifications is a self-compounding problem as these incorrect identifications are used by other sequence submitters to name their sequences.