Cell membranes—Composition: Structure: Function

Cell membranes are structures which form boundary layers between two cellular compartments. Membranes play an extraordinarily important part in the metabolism of cells. In some cells as much as 80% of the dry weight is localized within membranes. In this paper I wish to point out some fundamental differences in the chemical composition of some representative and well studied membranes which may explain, in part, some aspects of their structure and function.