See also
search_16s
command
Bit vector files are created by the udb2bitvec command. The recommended sequence database is the Greengenes 97% representative set. You should use the -wordlength 13 option of makeudb_usearch to create the udb file, as shown below.
usearch -makeudb_usearch gg97.fa -wordlength 13
-output gg97.udb
usearch -udb2bitvec
gg97.udb -output gg97.bitvec