Clustering of the g 3 distributions revealed four distinct lipid type populations rather than a single homogeneous mixture (Figure ). Visualizations of the g 3 distributions are described in detail with annotations in Figure . The peaks near cos θ = 1 correspond to atoms n + 1 bonds away from the central atom on the same side of the nearest-neighbor atom in the lipid tail hydrocarbon chain. Similarly, the peaks near cos θ = -1 are equivalent atoms n bonds away on the opposite side to the nearest neighbor. While the first peaks are always singular, the second peak and onward can be split into trans and gauche peaks. High atom order in stiff tails produces more pronounced and higher trans peaks, whereas fluid tails appear as more diffuse peaks and higher gauche peak density. Increased density near the center of the plot (peaking around the radial distance 4 < r < 6 Å) indicates atoms on the other tail and corresponds to increased tail packing in that specific atom location. Based on the g 3 distributions and visualizations, the clusters can be categorized into four different lipid structural motifs as follows: