Abstract

Flow cytometry enables the measurement of single cells in a flowing system. Heterogeneous mixtures of cells or particles can be analyzed with respect to their morphology, surface and intracellular protein expression, DNA content, and cellular physiology at high speed and purity. A series of key technical developments and improvements in flow cytometry hardware, software, and dye chemistry made it possible to measure more than 20 parameters simultaneously. Here, we provide a stepwise protocol for the preparation of single cell suspension samples from different murine lymphoid or tumor tissues and a detailed description of a 17-color polychromatic flow cytometry analysis of tumor-infiltrating leukocytes.

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