Fig. 3. (A) Glucose oxidase recovery after 3 days storage at –20 °C; (B) Taq polymerase activity recovery, after 3 days storage at –20 °C, expressed as number of threshold cycles (lower is more active). ** represents p < 0.01 compared to control, error bars are from a minimum of 6 repeats. C + D show fluorescence recovery of GFP after freeze (–20 °C)/thaw (27 °C). All solutions containing 100 mg mL–1 PEG plus PVA concentration indicated in the insert. (C) PVA 10 kDa; (D) PVA 23 kDa.
