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a) The illustration of immunomagnetic capture and on-demand photo-release of MHC-I positive, antigenic exosomes. b) Characterization of three tumor-targeting peptide antigens conjugated with photo-cleavable immunomagnetic beads for binding and photo-release of fluorescence-labeled immunogenic exosomes. The MHC-I antibody is used as the positive control. The error bar shows the three repeats with average measurement (RSD < ~5%).
