~3 - 5 %
||Lieber AD et al. Membrane tension in rapidly moving cells is determined by cytoskeletal forces. Curr Biol. 2013 Aug 5 23(15):1409-17. doi: 10.1016/j.cub.2013.05.063. p.1409 right column 2nd paragraphPubMed ID23831292
||Morris, C.E., and Homann, U. (2001). Cell surface area regulation and membrane tension. J. Membr. Biol. 179, 79–102.PubMed ID11220366
||"At higher tension values, there is a transition to an elastic regime in which the lipids are being pulled away from each other as the membrane is stretched out. Eventually, the bilayer
ruptures when the apparent membrane area increases by ~3%–5% compared to its relaxed state and the tension values reach ~3000–10,000 pN/µm [primary source]."