Total View of Exosome Preparation Obtained from: A, blood plasma of HFs; B, blood plasma of BBDPs; C, blood plasma of BCPs; D, culture medium of MCF-7 cells; E, ascetic fluid of OCPs; F, blood plasma of BOTPs; G, blood plasma of OCPs; H, culture medium of SVO-3 cells. Inserts shows exosomes. Arrows indicates exosomes, ellipses – «non-vesicles». Scale bars correspond to 100 nm. Electron microscopy, negative staining by phosphotungstate acid.