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Oligo Modifications List | Oligo Modifications Reference Category
Modification : BHQ-2-dT
Reference Catalog Number 26-6653
Category Quenchers
Modification Code BHQ-2-dT
5 Prime y
3 Prime y
Internal y
Molecular Weight (mw) 960.93
Extinction Coeficient (ec) 26.1
Technical Info (pdf) PS26-6653-02.pdf
Catalog NoScalePrice
26-6653-0550 nmol$295.00
26-6653-02200 nmol$295.00
26-6653-011 umol$383.50
26-6653-032 umol$575.25
26-6653-1010 umol$3,068.00
26-6653-1515 umol$3,835.00

Discounts are available for BHQ-2-dT!
Modification* Discount Price Structure
1 site/order List price
2 sites/order 10% discount
3 sites/order 20% discount
4 sites/order 30% discount
5-9 sites/order 50% discount
10+ sites/order 60% discount
*Exceptions apply

Related Modifications
BHQ-1 (3')
BHQ-3 (5')
Dabcyl dT
BHQ-1 (5')
BHQ-0 (3')
BHQ-2 (5')
BHQ-3 (3')
BHQ-2 (3')
BBQ-650 3'

Black Hole Quencher-2 deoxythymidine (BHQ2-dT) is classified as a dark quencher (a non-fluorescent chromophore) nucleotide base, and is typically used to internally label a Fluorescence Resonance Energy Transfer (FRET) DNA oligonucleotide probe with a quencher moiety. Such a labeling strategy is pertinent in cases where the distance between the quencher and fluorophore needs optimization for efficient quenching. Other basic technical information about BHQ-2 is found in the BHQ-2 technical sheet.

Quencher Spectral Data


Absorption Max, nm

Quenching Range, nm

Dabcyl 453 380-530
BHQ-0 495 430-520
BHQ1 534 480-580
BHQ2 579 550-650
BHQ3 672 620-730
BBQ-650 650 550-750
Click here for complete list of quenchers
**Black Hole Quencher License Agreement
Black Hole Quencher License Agreement. ""Black Hole Quencher®, BHQ®, CAL Fluor® and Quasar® are registered trademarks of Biosearch Technologies, Inc., Petaluma, California. The BHQ, CAL Fluor and Quasar dye technologies are protected by U.S. and world-wide patents either issued or in application. Compounds incorporating these dyes are made and sold under agreement with Biosearch Technologies, Inc. for end-user's non-commercial research and development use only. Their use in commercial applications is encouraged but requires a separate Commercial Use License granted by Biosearch Technologies, Inc."


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