1. Start with the ENA browser Sequence Search on the homepage.
2. Copy/paste the entire sequence into the search box.
Figure 3A. Search results showing the closest matches to the sequence and the organism they come from, namely the Ustilago maydis virus P4.
1. Click on the top result L12226.
2. Scroll down to the Other Features section to get the name of the gene product.
Figure 3B. Other Features section of EMBL-Bank entry L12226 showing the gene product to be KP4 toxin.