This company is offering a range of PE-Cy7 and APC-Cy7 conjugated monoclonal antibodies directed to human and mouse antigens and streptavidin conjugates.
     The PE-Cy7 conjugates, like FITC, R-PE and PE-Cy5, are excited by the 488nm light generated by an argon laser. The APC–Cy7 conjugates are excited by 600-647nm light, which provides a third color for dye lasers (600nm excitation) and a second color for HeNe lasers (644nm).
     These fluorescent resonance energy-transfer (FRET) dyes can be used in a variety of flow cytometric applications requiring the use of four or more fluorochromes. CALTAG Laboratories