BLAST Databases Tutorial
Organisms
All organisms
Nucleotide
Peptide
Query Sequence
Enter sequence below in FASTA format:

(load from example: nucleotide or peptide)
Or load it from disk:
Program
blastn - Nucleotide vs. Nucleotide
General Parameters
Max target sequences
Expect threshold
Word size
Scoring Parameters
Match score
Mismatch score
Gap opening penalty
Gap extension penalty
Strand
Filters and Masking Low complexity
Mask for lookup table only
General Parameters
Max target sequences
Expect threshold
Word size
Scoring Parameters
Matrix
Threshold
Gap opening penalty
Gap extension penalty
Filters and Masking Low complexity
Mask for lookup table only
General Parameters
Max target sequences
Expect threshold
Word size
Scoring Parameters
Matrix
Threshold                   
Strand
Filters and Masking Low complexity
Mask for lookup table only
General Parameters
Max target sequences
Expect threshold
Word size
Scoring Parameters
Matrix
Threshold
Gap opening penalty
Gap extension penalty
Filters and Masking Low complexity
Mask for lookup table only
General Parameters
Max target sequences
Expect threshold
Word size
Scoring Parameters
Matrix
Threshold
Strand
Gap opening penalty
Gap extension penalty
Filters and Masking Low complexity
Mask for lookup table only