Exosomes are a unique type of “extracellular vesicle” (EV), a term indicating that they exist outside and independent of the cell structure.

They are typically produced by eukaryotic cells (the biological term for cells with a clearly defined nucleus) and subsequently released into the bloodstream or tissues. Depending on where they come from, exosomes can contain multiple molecular constituents donated by their origin cell, including ribonucleic acid (RNA) and proteins.

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