Apoptotic cells which have released mitochondrial cytochrome c into the cytosol can be differentiated from non apoptotic cells which still retain cytochrome c in their mitochondria by fluorescence microscopy.

This kit contains a cytochrome c monoclonal antibody (50 µg) and an isotype-specific secondary antibody (50 µg) which has a fluorescein fluorophore conjugated to it. The kit also contains an ATP synthase V subunit alpha monoclonal antibody (50 µg) and the appropriate isotype-specific secondary antibody (50 µg) which has a Texas Red fluorophore conjugated to it.

ATP synthase is an inner mitochondrial membrane protein and serves as a mitochondrial marker since it is not released into the cytoplasm during apoptosis, unlike cytochrome c. Thus one is able to observe cytochrome c and a mitochondrial marker (ATP synthase subunit alpha) simultaneously by fluorescence microscopy using MSA07. Buffers and blocking solution for immunocytochemical analysis are also included in the kit.