<prompt> Vitamin which prevents autoxidation:TocopherolBiotinPyridoxineVitamin-A  <response>: Vitamin E acts as a lipid-soluble antioxidant in cell membranes, where many of its functions can be provided by synthetic antioxidants, and is impoant in maintaining the fluidity of cell membranes. It also has a relatively poorly defined role in cell signaling. Vitamin E is the generic descriptor for two families of compounds, the tocopherols and the tocotrienols. Ref : Bender D.A. 2011. Chapter 44. Micronutrients: Vitamins Minerals. In D.A. Bender, K.M. Botham, P.A. Weil, P.J. Kennelly, R.K. Murray, V.W. Rodwell Eds,Harpers Illustrated Biochemistry, 29e. 