PPepDB-ID	"Peptide Name"	PMID	"Plant source"	"Plant Family"	"Peptide Family"	"Peptide function"	"Peptide function description"	"Activity against"	Sequence	"Sequence Length"	Validation	"Avg. Molecular wt(Da)"	"Monoisotopic molecular wt(Da)"	pI	Method	"Additional information"
PPepDB_4030	IPRB_SAGSA	--NA--	"Sagittaria sagittifolia"	Alismataceae	--NA--	Signaling-peptide	"Direct protein sequencing; Protease inhibitor; Secreted; Serine protease inhibitor; Signal | Proteinase inhibitor B precursor (Double-headed proteinase inhibitor,B) (API-B).Secreted."	--NA--	AAIGFHGGLSTLHKDVCKSYVYEAPETDRGLPVSFSASATSEPVMQLGSRMAASNALLLISGALLISLAVLCQGDPVVDSDGDAVQLNLGGRYPLYTIESVNGKTLLGIGGEHFTVRFHKSDALAMKTAPQYKFSFLMPVPRICDTAWSVGKSTEETGVYKLAACSCEFCKIACPEVGSFN	181	"Experimental evidence at protein level"	19174	19161.55	5.78	--NA--	"FUNCTION:Possesses two reactive sites. Inhibits two molecules of trypsin simultaneously. Inhibits efficiently kallikrein, but chymotrypsin weakly.SIMILARITY:Belongs to the protease inhibitor I3 (leguminous Kunitz-type inhibitor) family.SEQUENCE CAUTION:Sequence=Ref.2; Type=Miscellaneous discrepancy; Note=Very different preliminary sequence; Sequence=Ref.3; Type=Miscellaneous discrepancy; Note=Very different preliminary sequence; Sequence=Ref.4; Type=Miscellaneous discrepancy; Note=Very different preliminary sequence; "