. Author manuscript; available in PMC: 2017 Oct 18.

Published in final edited form as: Biochemistry. 2016 Oct 7;55(41):5818–5831. doi: 10.1021/acs.biochem.6b00834

Table 2.

Pre-edge parameters for non-heme diiron enzyme species.

Species	K-edge energy (eV)	Pre-edge Area (units)	Assignment
WT ^R	7121.5	8.4	6C – Fe^II₂
WT ^R U	7121.7	7.4	6C – Fe^II₂
WT ^R S	7122.2	11.4	5C – Fe^II₂
E377D ^R	7122.8	10.4	5C – Fe^II₂
WT ^Oxa	7126.8	13.4	6C – Fe^III₂
sMMOH ^b	-	10	5C – Fe^II₂
Frog M ferritin ^c	7122	13.6	5/6C – Fe^II₂
DOHH ^d	7122.7	8.6	6C – Fe^II₂

Data from ref.¹⁹,

data from ref³³,

ferritin ferroxidase center from ref³⁴,

deoxyhypusine hydroxylase (DOHH) from ref³⁵.

Assignment column refers to the assigned coordination environment of the Fe centers.