# BLAST search Run nucleotide or protein BLAST against genomes in Arx. **To start:** first select **reference genomes** in the **Genomes** box and **Submit**. (Tip: use [**magic strings**](https://docs.abrinca.com/arx/guides/magic-strings/) to select genomes.) Then paste your **FASTA query sequence(s)** and choose the **BLAST type**. [Guide →](https://docs.abrinca.com/arx/guides/blast/)