“…The POP family is a new group of serine peptidases and different from the classic serine proteases, trypsin (Rajapakse, Ogiwara, & Takahashi, 2014) and subtilisin (Fernández, Daleo, & Guevara, 2015), in several structural features and catalytic behaviors (Polgar, 1994(Polgar, , 2002aRennex, Hemmings, Hofsteenge, & Stone, 1991;Szeltner et al, 2003). They regulate the activity of biologically active peptides and peptide hormones, and they are implicated in diseases, including amnesia, depression, diabetes, and trypanosomiasis (Rea & Fülöp, 2006).…”