Polyethylene glycol is used in gene delivery of protoplast transfection and incubation. It is used in the preparation of extraction for measuring cytosolic phosphoenolpyruvate carboxykinase (PEPCK) from plant tissues. It is useful to mediate DNA transformation into protoplasts derived from rice leaf sheaths.
Robertson, L. M.; Wood, C. M. Measuring gill paracellular permeability with polyethylene glycol-4000 in freely swimming trout: proof of principle. J. Exp. Biol. 2014, 217 (9), 1425-1429.
Vasa, D. M.; Dalal, N.; Katz, J. M.; Roopwani, R.; Nevrekar, A.; Patel, H.; Buckner, I. S.; Wildfong, P. L. Physical characterization of drug: polymer dispersion behavior in polyethylene glycol 4000 solid dispersions using a suite of complementary analytical techniques. J. Pharm. Sci. 2014, 103 (9), 2911-2923.