Fig. 2. A549 Cryopreservation (rapid freezing) and FITC-PVA permeability. (A) Post freeze–thaw A549 cell metabolic activity with and without PVA additives (MTT assay); (B) FITC-labelled PVA uptake into A549 cells following 2 hours exposure at 37 °C). All data from at least 3 repeats and errors bars represent ± standard deviation. * represents p ≤ 0.05 relative to DMSO only.
