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Frequently asked questions

Our Scientific Applications Support team has assembled a list of frequently asked questions to help you find answers quickly. Filter using one or more categories to focus on specific topics, or use the search bar to perform a text search.

What are the differences between use of Black Hole Quencher®-1 vs Black Hole Quencher®-2 dual-labeled probes?

Black Hole Quencher®-1 (BHQ-1) and Black Hole Quencher®-2 (BHQ-2) differ in the spectrum they are able to absorb. BHQ-1 is used to quench green and yellow dyes, such as FAM, TET, and HEX. BHQ-2 is preferred for quenching orange or red dyes, such as TAMRA™, Texas Red®, and Cy™ 5. BHQ-1 and BHQ-2 quenched oligos can be used together in a multiplex qPCR reaction.


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