[Study of electron transport in the photosynthetic systems of higher plants by the EPR method. V. Interaction of paramagnetic prob I(12,3) with the membranes of bean chloroplasts].

Lipid-soluble paramagnetic proble I(12,3) was subjected to partially reversible photoinduced redox transformations while interacting with the electron-transport chains of chloroplasts. Incorporation of I(12,3) into the chloroplast membrane does not affect the kinetic characteristics of the EPR I signal (from P700+). The parameters of the EPR spectrum from I(12,3) are not changed under illumination, however, they are sensitive to temperature and different additions (Mg2+, ATP, atebrin).