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Currently, the IDT ZEN quencher is available with FAM, HEX, TET, Yakima Yellow® (ELITech Group), JOE™ (Thermo Fisher Scientific), MAX™, and SUN™ fluorophores. Double-quenched probes have significantly lower background fluorescence, especially for longer probes.
The ZEN quencher is available on PrimeTime™ qPCR Probes and on the probes supplied with PrimeTime qPCR Probe Assays. For any special oligonucleotide requests that include the ZEN quencher but are not found on our website (non-catalog requests), please contact us.
For more information, see our DECODED™ article, Double-quenched probes increase qPCR sensitivity and precision.