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Drug-resistant exosomes can be absorbed by sensitive cells. a The morphological characteristics of exosomes by a transmission electron microscope. b The diameter of exosomes detected by dynamic light scattering. c Exosomes surface marker protein CD63, CD9 and CD81 detected by western blot analysis. d Fluorescence labeled and uptake exosomes through a laser confocal microscopy (×400). The experiment was repeated three times
