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Exosomes were isolated from donor animal serum after feeding them ovalbumin (OVA). Recipient animals were given pellet or serum supernatant, phosphate-buffered saline (PBS) and whole serum as controls. The OVA-specific immunoglobulin E (IgE) in serum was measured with passive cutaneous anaphylaxis (PCA). One representative experiment out of three is shown.
