Characterisation of exosomes from ovarian cancer cell lines. (A) Representative image of western blot for the presence of CD63 and CD9. S1-S4 and S5-S6 represent different exosomes isolation from OVCAR-3 and SKOV-3 cells, respectively. (B) Representative electron micrograph of exosomes isolated from OVCAR-3 and SKOV-3 cells. (C) Nanosight measurement of particle-size distribution in preparation from OVAR-3 (black) and SKOV-3 (red) exosomes (see Methods). In B, Scale bar 100 nm.