CytoTrace™ Orange CMTMR | CAS 323192-14-9

CytoTrace™ Orange CMTMR is a cell-tracking fluorescent dye built on the CMTMR scaffold, commonly used to label live cells for proliferation and migration studies. Its ester-containing, membrane-permeant design enables intracellular retention after uptake, allowing sustained orange fluorescence during routine imaging workflows. Researchers rely on CytoTrace™ Orange CMTMR to generate robust, trackable fluorescent populations for longitudinal experiments where dye dilution and retention provide readouts of cell division and cellular movement.

1. Cell Proliferation Tracking

CytoTrace™ Orange CMTMR is widely applied in proliferation assays where dye dilution across generations serves as a quantitative proxy for cell division. Flow cytometry and fluorescence microscopy users label cells at the start of an experiment and then monitor the shift in orange fluorescence intensity over time as daughter cells inherit less dye. This workflow is frequently used in immunology and cell biology to compare proliferation dynamics across experimental conditions, including co-culture setups and stimulation studies, while keeping the labeling chemistry compatible with standard staining and wash steps used in cell culture.

2. Live-Cell Migration And Imaging

CytoTrace™ Orange CMTMR supports fluorescence imaging of cell movement in culture, including wound-healing and transwell-style migration experiments. After labeling, researchers track the spatial distribution of orange-positive cells over time using fluorescence microscopy, enabling visualization of migration patterns and relative changes in motility. Because the dye is retained intracellularly under typical imaging conditions, it is often selected when investigators want to follow the same labeled population through multi-hour imaging sessions without requiring repeated staining.

3. Flow Cytometry Cell Labeling

CytoTrace™ Orange CMTMR is used as a practical flow cytometry labeling reagent to define fluorescent gates for labeled versus unlabeled populations and to quantify dye intensity distributions. In typical cytometry workflows, cells are stained with CytoTrace™ Orange CMTMR, washed to remove excess dye, and then analyzed using appropriate laser and filter settings for orange emission. This enables researchers to run time-course experiments, compare labeling uniformity across samples, and quantify changes in fluorescence intensity consistent with retention and dilution, supporting downstream analysis of cell-cycle-associated behaviors.

4. Multicolor Fluorescence Panels

CytoTrace™ Orange CMTMR is commonly incorporated into multicolor experiments where an orange channel is needed alongside other immunofluorescence or viability markers. Researchers design panel layouts by assigning CytoTrace™ Orange CMTMR to an orange detection window that minimizes spectral overlap with their chosen fluorophores, allowing simultaneous readouts such as phenotype markers plus proliferation or tracking information. This makes the dye useful in complex experimental designs where investigators want to correlate labeled-cell history with surface marker expression or viability status in the same dataset.