The protein family prediction tool is based on the protein family model of the PFAM database to predict the candidate gene members of the whole genome.

In addition to whole-genome family predictions for passion fruit, the online protein family prediction tool also provides gene family predictions for several common model plants, including rice, Arabidopsis and tobacco. In addition, users can download predicted results from this tool and submit them to the Domain Download tool of this website to extract structural fragments of target genes for further protein structure analysis.