This package contains some ribosomal rna blast databases distributed as part of the ncbi c toolkit that are too large and specialized to include in ncbi-data. specifically, it contains the databases combined16srrna_2-12-2008, lsuref_93.fasta, and ssuref_93.fasta, along with an alias file to facilitate searching all three of them in conjunction with the 16score database included in ncbi-data.