Label exosomes with RFP by expressing the pCT-CD63-RFP Cyto-Tracer in the parent cells. Great for tracking exosomes and monitoring cargo delivery. Monitor exosome dynamics with the pCT-CD63-RFP (pCMV) Exosome Cyto-Tracer (also available as a CD63-GFP fusion, pCT-CD63-GFP). Provided as either lentivector or pre-packaged virus, this Cyto-Tracer fuses RFP to the tetraspanin CD63, which then gets packaged into exosomes produced by the transfected cells. Great for creating stable cell lines that produce RFP-labeled exosomes as well as labeling exosomes from primary cells, tumor cells, stem cells, and more.