Fig. 1From: MSC surface markers (CD44, CD73, and CD90) can identify human MSC-derived extracellular vesicles by conventional flow cytometryRepresentative FCM dotplot showing acquired PBS 0.22 μm doubled filtered (a) and PBS doubled filtered with beads (0.5, 0.9, 3, 6–6.4 μm) (b). All samples used in this work were acquired when positive events were not present in the different fluorescence channels in the acquired PBS (double filtered)Back to article page