Vitamin E binding proteins in human serum.

The distribution of vitamin E in human serum lipoprotein fraction was investigated by measuring the amount of vitamin E in various protein fractions prepared by ultracentrifugation, gel filtration and electrophoresis. The larger part of the total serum vitamin E (up to 44%) was present in the alpha1-lipoproteins, while the beta-lipoproteins contained smaller concentrations (up to 26%).