1. Get the DNA sequence

• Go to NCBI - http://www.ncbi.nlm.nih.gov/
• Press
• Go to Nucleotides
• Set Search Field -> Keyword
• Set Mode -> List Terms
• Type Gal4 in the box
• Press Search
• Choose " gal4 protein (3) " from the List Terms -> Press Select
• Press " Retrieve 3 Documents "
• Display GenBank report for K01486
• Press MEDLINE

2. Sequence Homology Search

• Save Gal4 in FASTA format
• Press BLAST on the bar
• Go to Basic BLAST search
• Set Program -> blastn
• Set Database -> nr
• paste FASTA format of Gal4 in the box
• Press " Summit query "