BLAST Head-to-head Gene Sequences
This NCBI BLASTN service is maintained by SCBIT.

Enter a nucleic acid sequence or multiple nucleic acid sequences in FASTA format
Parameter options
Expect value threshold :
Max target sequences :
More other parameters :
          
An example for BLAST: 
>example
TCAGACTGAGGGACCCAACGGCATCTCTCTGCTGGTGAACCTTAAACGAGAGAGCACAGAGCGTGAAGAGCC
CACACCCTCCCCGTAACAGCAGGGGCTCCCCGAAGTCATTGGGAGTGAGGGGAGAAGGGAGGAGATCCCAGG
GACAGGAACACA