Definitions for "DAPI"
4, 6-diamino-2-phenylindole dihydrochloride
46-diamidino-2-phenyl indole (blue emitting fluorogen)
A highly specific and sensitive fluoresceing DNA stain used in epifluorescent microscopy to observe structures containing DNA. DAPI specifically binds to double stranded DNA, and when excited with light the DAPI-DNA complex fluoresces a bright blue (Porter & Feig 1980).