The CellROX™ Deep Red Flow Cytometry Assay Kit enables the flow cytometric detection of reactive oxygen species (ROS) in live cells. The kit includes the novel, fluorogenic CellROX™ Deep Red Reagent, as well as SYTOX™ Blue dead cell stain, N-acetyl cysteine (an antioxidant, for negative control), and tert-butyl hydroperoxide solution (TBHP, an inducer of ROS). View a selection guide for all CellROX™ Reagents and Kits. The CellROX™ Deep Red Flow Cytometry Assay Kit features: Fluorogenic probe formulated for flow cytometry that is oxidized in the presence of ROS Multicolor compatibility—minimal overlap with fluorophores excited by other laser lines, allowing easy multiplexing with other reagents Simple protocol—cells can be stained in complete media or other appropriate buffer, no need for serum free media The CellROX™ Deep Red Detection Reagent is cell-permeable and non-fluorescent or very weakly fluorescent while in the reduced state. Upon oxidation, the reagent exhibits a strong fluorogenic signal that has absorption/emission maxima of 644/665 nm and remains localized in the cytoplasm. When used together with the included SYTOX™ Blue Dead Cell Stain, oxidatively stressed and non-stressed cells are reliably distinguished from dead cells by flow cytometry.