4.5. Exercise — using the command-line

This is an exercise in using the command-line to accomplish a task. You will be making use of the commands discussed earlier.

Task

Given a protein sequence, identify matching sequences from a protein sequence database.

Approach

Using programs in the NCBI BLAST+ package, you can search a database of sequences using sequence (query) to identify matching sequences.

• 4.5.1. Summary of steps
• 4.5.2. Get sample data
• 4.5.3. Install NCBI BLAST+ package
• 4.5.4. Download query sequence
• 4.5.5. Download protein sequence database
• 4.5.6. Search database using query sequence