Table 1.

Fits obtained for the Fe K-EXAFS of the as-isolated MBP-EcFeoC, cleaved anaerobically reconstituted EcFeoC, and cleaved anaerobically reconstituted KpFeoC by curve fitting using the program EXCURVE 9.2.

		Fe-S			Fe-Fe			Fe-Fe			Eoe
Sample/fit	Fit indexa	Nob	Rc (nm) [Å]	DWd (nm2) [Å2]	No	R (nm) [Å]	DW (nm2) [Å2]	No	R (nm) [Å]	DW (nm2) [Å2]
MBP-EcFeoC	0.75	3	0.226 [2.26]	0.00011 [0.011]	1	0.272 [2.72]	0.00005 [0.005]				0.743
Cleaved reconstituted EcFeoC	0.49	4	0.226 [2.26]	0.00012 [0.012]	2	0.271 [2.71]	0.00005 [0.005]	1	0.2451 [2.541]	0.00004 [0.004]	2.256
Cleaved reconstituted KpFeoC	0.92	4	0.231 [2.31]	0.00010 [0.010]	2	0.272 [2.72]	0.00006 [0.006]	1	0.2854 [2.854]	0.00007 [0.007]	−4.772

^aThe least-squares fitting parameter (see Materials and Methods)

^bCoordination number

^cBond length

^dDebye-Waller factor

^ePhotoelectron energy threshold