BHQ-1® is best suited for fluorophores that emit in the wavelength range from FAMTM to TAMRATM.
View product details for Black Hole Quencher®-1:
BHQ®-2 is best suited for fluorophores in the Cy3TM to Cy5TM wavelength range.
View product details for Black Hole Quencher®-2:
Dabcyl is a relatively weak dark quencher and is best suited for use in Molecular Beacons where the hairpin places the quencher and fluorescent dye in close proximity.
View product details for Dabcyl: