MMS® HEK293 serum-free medium is a serum-free, protein-free and animal-free chemical component qualified medium used in the HEK293 cell suspension culture and transfection process. The product contains HEPES, sodium bicarbonate, amino acids, vitamins, phenol red, trace elements, F-68 and other components conducive to the growth and expression of HEK293 cells. L-glutamide should be added before use.