Skip to main content
. Author manuscript; available in PMC: 2006 Mar 3.
Published in final edited form as: Appl Magn Reson. 2001;21(3-4):413–424. doi: 10.1007/bf03162417

Table 1.

Zero-field splittings for some manganese and iron proteins.

Metal ion Proteina Protein ligandsb D-value (cm−1) E/D Method Reference(s)
Mn2+ MnLO unk +0.10–0.07 0.13–0.23 EPR 94 GHz This paper
Mn2+ SOD-Az N3O2(+N) <0.3 ~0 EPR/MCD 5
Mn2+ MndD N2O <0.033 <0.05 EPR 6
Mn2+ ConA N1O3 0.022 0.185 EPR 35 GHz 7
Mn2+ p21Ras-ADP O1(+5O) 0.011 0.27 EPR 8
Fe3+ sbLO N3O3 +1–2 0.01–0.065 EPR/MCD 15, 17
Fe3+ SOD N3O2 >1.5 0.24 EPR 35 GHz 16
a

Abbreviations: LO, lipoxygenase; SOD-Az, superoxide dismutase-azide complex; MndD, a facial triad protein, Mn2+ dependent 3,4-dihydroxyphenylacetate 2,3-dioxygenase; ConA, concanavalin A; Ras, product of ras gene.

b

Ligands are contributed by both protein side chains, NxOy, and atoms (+N or O) of small molecules that bind the metal center.