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_5426	PER21_ARATH	--NA--	"Arabidopsis thaliana"	Brassicaceae	--NA--	Signaling-peptide	"Biological rhythms; Calcium; Complete proteome; Glycoprotein; Heme; Hydrogen peroxide; Iron; Metal-binding; Oxidoreductase; Peroxidase; Signal | Peroxidase 21 precursor (EC 1.11.1.7) (Atperox P21) (PRXR5),(ATP2a/ATP2b)."	--NA--	ETLYYKHGNTAVSWLRNLFHDCVVKSCDASLLLETARGVESEQKSKRSFGMANAKPFCLLGFFCLLLQLFSIFHIGNGELEMNYYKESCPKAEEIIRQQVMRNFKYVKIIKDALEKECPSTVSCADIVALSARDGIVMLKGPKIEMIKTGPMVVDNMYYKNIMAHKGLLVIDDELATDPRTAPFVAKMAADNNYFHEQFSRGVRLLSETNPLTGDQGEIRKDCRYVNRRDSRGSYLGDVETLIPNHNDSLSSVISTFNSIGIDVEATVALLGAHSVGRVHCVNLVHRLYPTIDPTLDPSYALYLKKRCPSPTPDPNAVLYSRNDRET	327	"Experimental evidence at protein level"	36741.19	36717.55	7.25	--NA--	"FUNCTION:Removal of H(2)O(2), oxidation of toxic reductants, biosynthesis and degradation of lignin, suberization, auxin catabolism, response to environmental stresses such as wounding, pathogen attack and oxidative stress. These functions might be dependent on each isozyme/isoform in each plant tissue.FUNCTION:Might function as heat shock-like defense protein. May be implicated in the systemic acquired resistance response.CATALYTIC ACTIVITY:Donor H(2)O(2) = oxidized donor 2 H(2)O.COFACTOR:Binds 1 heme B (iron-protoporphyrin IX) group per subunit (By similarity).COFACTOR:Binds 2 calcium ions per subunit (By similarity).TISSUE SPECIFICITY:Preferentially expressed in roots and leaves, slightly in stems.DEVELOPMENTAL STAGE:Up-regulated during leaf development.INDUCTION:Late induced after mechanical wounding. Enhanced expression following incompatible bacterial pathogen attack.Expressed under a diurnal rhythm (circadian clock control).MISCELLANEOUS:There are 73 peroxidase genes in A.thaliana.SIMILARITY:Belongs to the peroxidase family. Classical plant (class III) peroxidase subfamily."