Phase diagram of phospholipid/cholesterol complexes, such as DMPC/cholesterol and DPPC/cholesterol, as reported by, for example,

<p><a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0066162#pone.0066162-Vist1" target="_blank">[35]</a>–<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0066162#pone.0066162-Marsh1" target="_blank">[40]</a>. Besides the well known gel and fluid phases, the so-called liquid-order phase is observed at high cholesterol concentrations. The 32.5 mol% sample, as depicted by the ⊛, was determined to be in the <i>l_o</i> phase.