positive liposomes consisting of phosphatidylcholine , cholesterol and stearylamine and negatively charged liposomes consisting of phosphatidylcholine , cholesterol and phosphatidylserine , were double labelled with either 3h-labelled dipalmitoyl phosphatidylcholine and [ 14c ] cholesterol or with [ 14c ] cholesterol and [ 3h ] methotrexate entrapped in the aqueous phase .
C1959616
phosphatidylcholine
C0000039
dipalmitoyl phosphatidylcholine