Surface chemistry studies of photosystem II

The monolayer systems of PS II membranes, PS II sore complex particles, and the mixture of monogalactosyldiacylglycerol (MGDG) with PS II core complex particles were constructed by means of the Langmuir technique. The surface pressure and surface potential properties of these systems sere analyzed. The apparent particle sizes were determined from surface pressure-area isot herms, which were 200 nm(2) for PS II membranes and 320 nm(2) for PS II cor e complex particles. The surface pressure isotherm analysis of the mixed mo nolayer of MGDG and PSII core complex particles shows that the mixed monola yer has good miscibility at all surface pressures. (C) 1999 Academic Press.