CF640R Annexin V conjugate is Annexin V labeled with our superior far red fluorescent dye CF640R. Annexin V is a 35-36 kDa protein that has a high affinity for phosphatidylserine (PS). In normal viable cells, PS is located on the cytoplasmic surface of the cell membrane. In apoptotic cells, however, PS is translocated from the inner to the outer leaflet of the plasma membrane, making itself available for Annexin V binding.
CF640R dye is brighter and far more photostable than Alexa Fluor? 647 when excited by the 633 or 635 nm laser, making CF640R Annexin V an excellent choice for both flow cytometry and microscopy applications (download the CF640R Flyer for more information).