EasyProbes™ DAPI is a commonly used nuclear counterstain for fixed cells that emits blue fluorescence upon binding to the minor groove of dsDNA. Our EasyProbes™ DAPI Fixed Cell Stain is formulated in a ready-to-use solution that is provided in a convenient-to-use dropper bottle. Just tip and drip two drops per ml to stain your cells. DAPI is widely used for nuclear and chromosome counterstain, showing a distinct banding pattern in chromosomes.