Cell culture is one of the major tools used in cellular and molecular biology, providing
excellent model systems for studying the normal physiology and biochemistry of cells
(e.g., metabolic studies, aging), the effects of drugs and toxic compounds on the cells,
and mutagenesis and carcinogenesis. It is also used in drug screening and development,
and large scale manufacturing of biological compounds (e.g., vaccines, therapeutic
proteins). The major advantage of using cell culture for any of the these applications is
the consistency and reproducibility of results that can be obtained from using a batch of
clonal cells.