to determine whether a specialized class of endocytic vesicles could account for the selective transfer of igg , mixtures of igg conjugated to ferritin ( igg-ft ) and unconjugated horseradish peroxidase ( hrp ) were injected together into the proximal intestine of 10-d-old rats , and the cellular distribution of these two different tracers was determined by electron microscopy .
C0887883
endocytic vesicles
C0007634
cellular