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. 2020 Sep 23;10:1728. doi: 10.3389/fonc.2020.01728

FIGURE 1.

FIGURE 1

Structure of exosome. Exosomes are small vesicles with a double-membrane structure. The phospholipid bilayer is embedded with many transmembrane proteins, marker proteins, and receptors, such as heat chock proteins, lipid rafts, immune-regulatory molecules, cytoskeleton proteins, membrane fusion proteins, etc. Exosomes consisted of DNA, RNAs, cytokines, enzymes, and other bioactive molecules, which are transmitted from original cells to target cells.