All cells express characteristic markers (proteins, lipids, glycosylation, etc.) that can be used to help distinguish unique cell types. Cell markers can be expressed both extracellularly on the cell's surface or as an intracellular molecule. This page covers surface and intracellular cell markers for a variety of cell types including immune cells, stem cells, and central nervous system cells. Select your cell of interest from the dropdown menus below to learn about the markers they express.