The BP4 particles in the MARTINI force field prevent this process. This process is the first step in a technique that later adds a platinum “shadow”, then a thin coat of carbon to make a replica. Compounds that enhance stability when this process is performed are classified as “penetrating” (15[1])if they cross cell membranes. In one technique, a sample is embedded in OCT compound, this process is performed, then a specialized microtome is used. One can study (*) lipid membranes by performing this process, then fracturing the membrane lengthwise to (-5[1])expose (10[1])the interior. Ethane is used to perform a “flash” version of this process in a very high resolution form of electron microscopy. Biological tissues are mixed with ethylene glycol to prevent damage caused by, for 10 points, what phase (10[1])transition seen in cryo-EM? ■END■