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Schematic illustration of a membrane-enveloped HIV VLP. The protein core of immature HIV VLPs is composed of unprocessed Gag precursor proteins (grey) and surrounded by the lipid bilayer of the expression cell (blue). Envelope glycoproteins (Env) proteins are shown in yellow on the VLP, representing a decorated HIV VLP (left) and a bald VLP without decoration (right). Created with BioRender.com.
