For facs or microscopy Alexa 1 conjugate.Alexa Fluor 633 is a practical alternative to APC as well as Cy5. Bioss Primary Conjugated Antibodies. ALEXA FLUOR made this Alexa Fluor 633 conjugate that can be used in multi-color flow cytometry with instruments equipped with a second red laser or red diode. It is detected in the FL4 detector of the core's upgraded 2-laser FACScans. Like other Alexa Fluor dyes, the Anti-alpha MSH exhibits uncommon photo stability, making it an ideal choice for fluorescent microscopy.If you buy Antibodies supplied by Bioss Primary Conjugated Antibodies. ALEXA FLUOR they should be stored frozen at - 24°C for long term storage and for short term at + 5°C.