Table 1.

Classification of phytochelatins.

PC Family	Peptide Structure	Identification
Phytochelatins
PCn-Gly	(γGlu-Cys)n-Gly	PCn
Iso-phytochelatins
PCn-Ser	(γGlu-Cys)n-Ser	iso-PCn(Ser)
PCn-Ala	(γGlu-Cys)n-Ala	iso-PCn(Ala)
PCn-βAla	(γGlu-Cys)n-βAla	iso-PCn(βAla)
PCn-Glu	(γGlu-Cys)n-Glu	iso-PCn(Glu)
PCn-Gln	(γGlu-Cys)n-Gln	iso-PCn(Gln)
PCn-Asn	(γGlu-Cys)n-Asn	iso-PCn(Asn)
PCn-Cys	(γGlu-Cys)n-Cys	iso-PCn(Cys)
des-Gly-PCn	(γGlu-Cys)n	des-Gly-PCn
des-γGlu-PCn-Gly	Cys-(γGlu-Cys)n−1-Gly	des-γGlu-iso-PCn(Gly)
des-γGlu-PCn-Ser	Cys-(γGlu-Cys)n−1-Ser	des-γGlu-iso-PCn(Ser)
des-Cys-PCn-Glu	Glu-(γGlu-Cys)n−1-Glu	des-Cys-iso-PCn(Glu)