Blasts query sequences on 18S and 28S radiolaria databases. Renkan Blast permits to search a nucleotide database using a nucleotide query, using the NCBI BLAST and blastn command line tool. Algorithms include blastn, megablast, and discontiguous megablast. User can also search against a FASTA file of subject (target) sequences. This method is slower (only one CPU is used), but more importantly gives e-values for pairwise searches (very small e-values which will look overly significant).