Fluorescently activated cell sorting (FACS) is routinely used in the bio-pharma industry to isolate distinct cells from heterogeneous cell suspensions with high purity and viability. Typically, cells in suspension are tagged with fluorescent antibodies and can then be identified and isolated for further analysis or cell culture. 

Magnetic activated cell sorting (MACS) uses magnetic particles conjugated to antibodies against various cell surface antigens. When added to cells, these conjugated particles bind to cognate antigen. By placing this magnetic particle-cell suspension in a magnetic field, separation of bound cells is facilitated.

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