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Dabcyl is a relatively weak dark quencher and is best suited for use in Molecular Beacons when the hairpin places the quencher and fluorescent dye in close proximity.

3Prime maintains the chemical structures of Iowa Black FQ, Iowa Black RQ and certain other fluorescent dye supports as proprietary trade secrets and thus does not publish the chemical structures to our website.  3Prime can disclose those structures pursuant to a confidentiality agreement, which would prohibit their broader publication to third parties.