Table 4.

Stability constants for various copper-binding ligands.

Copper binding ligand	Thiol complexation	Technique	Stability constant (K′)
GSH	Monothiol	EMF Titration	13.9
Cystein	Monothiol	PGSK Titration	11.1
Arg-Cys	Monothiol	PGSK Titration	11
Gln-Cys	Monothiol	PGSK Titration	11.4
DTT	Dithiol	BCS Titration	15.3
Synthetic dicysteinal peptides	Dithiol	BCS Titration	15.5–16.7
Tripodal-cysteine	Trithiol	BCS Titration	18.8–19.2
GSH3	Trithiol	BCS Titration	18.8