Figure 2From: Stability studies of HIV-1 Pr55gagvirus-like particles made in insect cells after storage in various formulation mediaComparison of VLP morphology after storage in different osmolytes using TEM. (A) Freshly prepared VLPs resuspended in 1 × PBS. (B) VLPs after 12 months storage in 15% trehalose at −70°C. (C) VLPs after 3 months storage in 15% sucrose at −70°C. (D) VLPs after 3 months storage in 15% sorbitol at −70°C. Scale bars = 500 nm.Back to article page