a detailed investigation of thiocyanate binding to neutral popc and to positively charged mixed popc/dihexadecyldimethylammonium bromide ( dhdmab ) ( 8:2 mol/mol ) membranes revealed changes in the 2h nmr quadrupole splittings from popc specifically deuteriated at either the alpha-segment or the beta-segment of the choline head group which were consistent with a progressive accumulation of excess negative charge at the membrane surface with increasing scn- concentration .
C0031716
popc
C0008405
choline