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Orientation of ci 's g tensor in the presence of NQNO. (A) EPR spectra were recorded on partially ordered multilayers of chloroplast membranes from spinach in the presence of NQNO. The angle between the magnetic field and the membrane plane is indicated for each spectrum. EPR settings are as for Fig. 1 except for temperature (6 K) and microwave power (63.8 mW). (B) Polar plots of signal amplitudes are shown.
