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The 5-ATTO 425 modification incorporates an ATTO™ 425 dye (ATTO-TEC GmbH) at the 5' terminus of an oligonucleotide. With a large Stokes-shift, strong absorption and high fluorescence quantum yield, ATTO 425 can be used in a wide array of applications, including dual-labeled fluorogenic probes for real-time PCR. ATTO 425 is a coumarin dye and can be used as a substitute for Alexa Fluor® 430; particularly where enhanced photostability is desired. Fluorescing in the blue region of the visible spectrum, ATTO 430 can be effectively quenched by BHQ®-0 dye.

Properties:

  • Formula:

    C28H39N2O9P

  • Molecular Weight:

    578.59

  • Absorption Maximum (Lambda Max):

    436

  • Extinction Coefficient at Lambda max:

    45000

  • Extinction Coefficient at 260 nm:

    12150

  • Fluorescence Maximum:

    484

Product usage:

  • The mass this product adds after conjugation and work-up (the additional mass seen by mass spectrometry) is:

    562.59

Storage and handling: