Table 4.

Nuclear spin Hamiltonian parameters for N-His and N-Hem in the LS and HALS forms of Cyt c₆

	N-His	N-Hem
LS form
AXX (MHz)		−4.7 ± 0.2
AXY (MHz)		0.7 < | AXY | < 2.1
AYY (MHz)	−5.5 ± 0.4	−4.4 ± 0.4
AZZ (MHz)	−4.7 ± 0.5	−5.3 ± 0.5
Qmax (MHz)	0.8 ± 0.1∗	0.9 < Qmax < 1.1∗
Qz (MHz)	−0.7 ± 0.1	−0.4 ± 0.1
Θ (degrees)†		72 < Θ(1) < 111	−20 < Θ(2) < 24
HALS form
AXX (MHz)		−2.7 ± 1.2
AXY (MHz)		2.4 ± 2.4
AYY (MHz)		−4.9 ± 1.2
AZZ (MHz)	−4.3 ± 0.6	−5.4 ± 0.7 ‡
		−5.5 ± 0.1 §
Qmax (MHz)	0.8 ± 0.1∗	0.9 < Qmax < 1.1∗
Qz (MHz)	−0.5 ± 0.1	−0.4 ± 0.1

^∗From the bibliography (see text).

^†The two values correspond to the two sets of equivalent N-Hem nuclei (see text).

^‡Obtained from g_Z-HYSCORE spectra (see text).

^§Obtained from 1D ESEEM at high fields (see text).