has endpoint uses detection instrument has assay supporting method has assay supporting method flow cytometry FACS assay FACS FACS Flow cytometry uses the principles of light scattering and fluorescence from fluorochrome molecules to generate specific multi-parameter data from particles and cells in the size range of 0.5um to 40um diameter. Fluorescence-activated cell sorting flow cytometry assay Fluorescence-activated cell sorting fluorescence method Z-score cell separation method CyAn Flow Cytometer