DMEM and EMEM are liquid serum-free media formulations and variations of Basal Medium Eagle (BME). Both mediums lack protein and contain the amino acids, salts, glucose and vitamins, required to provide a cell with energy and maintain cells in tissue culture, but the DMEM formulation is modified to contain up to four times more vitamins and amino acids, and two to four times more glucose than EMEM. This modified composition makes DMEM suitable for more specific cell types.