Table 3. Geometry values for selected bonds and angles at the haem active site of the oxyferrous DtpA structure.

	Monomer A	Monomer B
Fe—N∊ His353 (Å)	2.2	2.1
His353 Nδ—Oδ2 Asp412 (Å)	2.6	2.6
Fe—O1 (Å)	2.3	2.1
O1—O2 (Å)	1.3	1.3
O1—NH1 Arg369 (Å)	2.8	3.0
O2—Oδ1 Asp251 (Å)	2.9	3.2
Fe—O1—O2 (°)	146	144