Phytochelatin (PC)-related peptides were prepared by a conventional solution method and their heavy metal-binding properties were examined. Different from the Cu2+ and Cu+ -binding properties of metallothionein (MT)-related peptides, the Cu2+ and Cu+ -binding properties of PC-related peptides were fairly dependent on structure. It is of interest that gamma-Glu-Cys-Gly (glutathione) exhibited quite