. Author manuscript; available in PMC: 2014 Sep 24.

Published in final edited form as: Biochemistry. 2013 Sep 13;52(38):10.1021/bi4007622. doi: 10.1021/bi4007622

Table 1.

Mössbauer parameters of [2Fe-2S]²⁺ and [4Fe-4S]²⁺ cluster-bound forms of AtNfu2

Cluster type	Fe Site	δ(mm/s)	ΔE_Q(mm/s)
[2Fe-2S]²⁺	1	0.27	0.70
[2Fe-2S]²⁺	2	0.27	0.43
[4Fe-4S]²⁺	pair 1^a	0.49	1.30
[4Fe-4S]²⁺	pair 2^a	0.48	1.03

The [4Fe-4S]²⁺ cluster is comprised of two valence-delocalized [2Fe-2S]⁺ pairs.