As an early indication of apoptosis, phosphatidylserine (PS), which is a cell membrane phospholipid, moves from inside to outside of cell membrane and is exposed to outside cell. ApoFlamma® PS series attaches this phosphatidylserine (PS) of cell membrane to detect apoptosis. This product is a probe product that combined specific peptide sequence and outstanding Flamma® 675 fluorescence sample of BioActs. After completing a simple treatment process using ApoFlamma® PS Series, cells that have undergone apoptosis can be identified through Fluorescence microscope or Flow cytometryIt is recommended to use propidium iodide (PI) together for more accurate results of analysis. Excitation / Emission (nm):  675 / 691 nm.