Table 1.
Native MauG Hemes | Ca2+-depleted MauG hemes | |||
---|---|---|---|---|
HSa | LSa | LSb | LS* | |
Dc (cm-1) | 10 | |||
E/D c | 0 | |||
Δ/λc | 2.95 | 3.43 | ||
V/Δc | 0.68 | 0.55 | ||
g x | 5.57 | 1.87 | 1.52 | 1.52 |
g y | 1.99 | 2.19 | 2.32 | 2.27 |
g z | 1.99 | 2.54 | 2.89 | 2.97 |
Ax/gn/βn (T) | –18.0 | –35.0 | –38.7 | –32.0 |
Ay/gnβn (T) | –18.0 | 9.30 | 22.6 | 15.0 |
Az/gnβn (T) | –18.0 | 29.4 | 50.6 | 50.0 |
ΔEQ (mm/s) | 2.0 | 2.09 | 2.44d | 2.17d |
δ (mm/s) | 0.50 | 0.25 | 0.33 | 0.28 |
η e | 0.4 | –3.0 | –3.0 | –2.0 |
The His-Tyr heme
Low-spin species derived from freezing of the HS heme
Δ and V are the axial and rhombic crystal field parameters and λ is the spin-orbit coupling constant; D is zero-field splitting; E/D is rhombicity parameter; An/gnβn is the saturation field
value at 180 K
η = (Vxx – Vyy)/ Vzz, where Vii values are the principle components of the electric field gradient tensor.