| Required for nucleotide searches. Value must be set to plus or both.
 
 
| -strand plus |  | Search for hits on the forward (plus) strand only. This is 
faster, so is recommended when the query sequences are known to be oriented on 
the same strand as the database. 
 |  
| -strand both |  | Search for hits on both the forward and 
reverse-complemented strands. 
 |    |