keywords Animals Biological Transport Cell Line Cytoskeleton Endocytosis Endosomes Exocytosis Fluorescent Antibody Technique Gene Expression Green Fluorescent Proteins Kinetics Luminescent Proteins Membrane Glycoproteins Microtubules Mutation Phosphatidylinositol 3-Kinases Recombinant Fusion Proteins Viral Envelope Proteins rab GTP-Binding Proteins