The FlowCellect™ Human NK Cell Characterization Kit includes three directly conjugated antibodies, Anti-CD3-APC, Anti-CD56-PE, and Anti-CD16 FITC. This three color kit is designed to characterize NK within mixed cell populations. The antibodies provided have been carefully titrated to ensure the ability to accurately measure the expression of all markers simultaneously. Sufficient reagents are provided to perform 25 three-color tests. Detailed assay instructions are included to assist in analysis and to ensure the correct cell concentration is obtained during acquisition of sample data.