What are the applications of carbocyanine dyes?

Carbocyanine dyes are a class of highly fluorescent dyes. They have a wide range of applications including but not limited to: 

• Labeling plasma membranes
• Retrograde and anterograde labeling in fixed tissue
• Labeling and visualizing blood vessels
• Studying living neurons of identified origin in long-term cultures 
• Simultaneous visualization of vasculature and surrounding tissue structures
• Mediating imaging and targeted drug delivery for human brain tumor