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Formation of PyC-metal complexes. A. PyCs form complexes with metal ligands. Metal ligands in 2+ oxidation state will bind with the sulfurs of thiol groups on two cysteine residues. B. An example of the elemental formulas in PyCDB for the base PyC, phytochelatin2-glycine (PyC2-Gly), in metal-bound and unbound forms. C. An example of the abbreviated name for the base PyC form, number of repeating peptide units, and metal (if bound).
