TABLE 5.

Ligand bond lengths (Å) in the primary site of the Cu²⁺-FetP crystal structure

Only ligand distances up to 3 Å are listed

Atom	Distance to copper site
	CuA1	CuA2	CuB1	CuB2
	Å
His44	2.1	2.1	1.9	2.1
His97	1.8	2.3	1.8	2.4
His127a	2.3	2.2	2.1	2.2
Met90-1b	2.7		2.7
Met90-2b		2.3		2.2
Glu46	2.7

^a His¹²⁷ originates from the symmetry-related subunit.

^b Two conformations of Met⁹⁰ are observed.