Table 1. Distances (Å) Between Cu and Surrounding Atoms in the Reduced State of Azurin as Obtained from Structural Studies Reported in the Literature.

	Cu–SCys112	Cu–NδHis117	Cu–NδHis46	Cu–SMet121	Cu–OGly45
1AZU6	1.79	2.42	2.15	3.21	2.47
4AZU52	2.27	2.11	1.99	3.18	2.84
	2.27	1.98	2.06	3.16	2.95
	2.24	1.96	2.13	3.21	3.05
	2.17	2.00	2.12	3.05	3.03
1DZ075	2.16	2.02	2.03	3.26	2.75
1NWO76	2.13	1.94	2.01	3.01	3.16
	2.14	1.96	1.93	3.14	2.95
2CCW77	2.21	2.00	2.02	3.26	2.94
2AZA78	2.12	2.01	2.08	3.12	3.16
	2.17	1.99	2.09	3.10	3.09
XRD AVG	2.15	2.03	2.05	3.16	2.93
XRD STD	0.12	0.13	0.06	0.08	0.20
EXAFS36	2.12	1.86/1.94	1.86/1.94	3.39	2.82