three populations of pure coated vesicles from adrenocortical cells , differing in their density , i.e. , 1.125-1.155 , 1.155-1.175 , and 1.175-1.210 g/cm3 , are obtained after separation on two successive sucrose-2h2o gradients .
C0242915
coated vesicles
C0007634
cells