Main Page | See live article | Alphabetical index The Fluid mosaic model for the plasma membrane is based on the changing location and pattern of protein molecules in a fluid phospholipid bilyer. In the fluid mosaic model, a flexible layer made of lipid molecules is interspersed with large protein molecules that act as channels through which other molecules enter and leave the cell. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.