*3.1. Identification of bHLH Family of Passion Fruit*

There were 117 *PebHLH* members identified from the passion fruit genome by the methods of HMM, protein BLAST, and MEME analyses. The characteristics of the *PebHLH* (Table S1) were analyzed, and the length of the *PebHLH* CDS ranged from 276 bp of *PebHLH3* to 3006 bp of *PebHLH73*. The identified *PebHLHs* encoded proteins ranged from 91 amino acids of *PebHLH3* to 1001 amino acids of *PebHLH73*. In addition, all the *PebHLHs* were showed containing three phosphorylation sites (Tyr, Thr, and Ser). The subcellular location prediction showed that the PebHLHs were distributed in the periplasmic, cytoplasmic, extracellular, and outer membranes. The molecular weight ranged from 10.43 Da to 114.67 Da.
