DAPI is a common nuclear and chromosomal counterstain that fluoresces blue when bound to the AT region of DNA. Although this dye is cell-impermeable, it does enter living cells at high concentrations.

Also available as a room temperature stable, ready-to-use solution: NucBlue Fixed Cell Ready Probes Reagent< /a>.
View other Ready Probes ready-to-use imaging reagents and accessories›