What is the chemical composition of a typical mammalian cell?

Molecular Component                 % of Total Cell Weight

Water                                                                              70

Proteins                                                                           18

Phospholipids and other lipids                                     5

Miscellaneous small metabolites                                3

Polysaccharides                                                             2

Inorganic ions (sodium, potassium, magnesium,    1

calcium, chlorine, etc.)

RNA                                                                                1.1

DNA                                                                              0.25