English: Diagram showing the features of the function-spacer-lipid construct of a kodecyte, using the analogy of a Lego minifigure. As indicated in the figure, the function group analogous to the minifigures head can be arranged in different substances, the spacer analogous to the body of the minifigure (including the arms) can have a variety of different features, and the lipid or minifigure legs can be a variety of different lipids. Together the three components of function, spacer & lipid represent the FSL construct.