TABLE 1.

First ligand distances for the iron site in ferrocytochrome c obtained from the PDB

PDB ID	Crystal/solution	Organism	Reference	Experimental method	Fe-Np (Å)	Fe-Nɛ2 (Å)	Fe-Sδ (Å)
1KX2	Solution	Shevanella	Bartalesi et al. (37)	NMR	2.07	1.96	2.37
1GIW	Solution	Horse	Banci et al. (36)	NMR	2.08	1.94	2.36
2FRC	Solution	Horse	Qi et al. (35)	NMR	1.95	1.93	2.23
5CYT	Crystal	Tuna	Takano and Dickerson (30)	XRD	2.04	1.98	2.31
1CYC	Crystal	Bonito	Tanaka et al. (29)	XRD	1.81	2.60	2.49