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Purified VP60Δ-L2BS VLPs (a), capsomer-like structures obtained after treatment of VLPs with EGTA and dithiothreitol (b), VP60Δ-L2BS VLPs refolded after reassembly of the capsomers in the presence of CaCl2, DMSO and β-galactosidase plasmid (c). Bar, 100 nm.
