As such, we instead measured the properties of each individual lipid. In this case, from the radial distribution function (RDF) we extracted a measure of the density of the number of lipids within the first shell of each individual lipid. Specifically, the nonnormalized RDF was measured for the second tail beads for each tail (C2A, C2B, D2A, D2B) and the R1 bead for cholesterol relative to the second tail bead of each lipid.