Table 1.

List of measured samples

Sample	[Cu2+] (mM)	[Zn2+] (mM)	Cu2+ bound (eq.)	Edge	Cα (%)	Cβ (%)
S1	0.16	0	0.8	Cu	0	100
S2	0.4	0	2	Cu	80	20
S3	0.6	0	3	Cu	100	0
S1_Zn	0.16	0.6	0.8	Cu, Zn	55	45
S2_Zn	0.4	0.6	2	Cu, Zn	85	15
S3_Zn	0.6	0.6	3	Cu, Zn	100	0
B_Cu	2.0	0		Cu
B_Zn	0	2.0		Zn

For each sample (column 1) the concentration of Cu²⁺ in mM and equivalents (columns 2 and 4) and of Zn²⁺ in mM (column 3) is given. In column 5 the edge at which each spectrum has been collected is reported. In the last two columns we give the percentage of α and β components (see text) as obtained from Fig. 1