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The 5-ATTO 680 modification incorporates an ATTO™ 680 dye (ATTO-TEC GmbH) at the 5' terminus of an oligonucleotide. ATTO 680 modifications exhibit high thermal, pH, and photo-stability. With good water solubility, strong absorption and high fluorescence quantum yield, ATTO 680 can be used in a wide array of applications, including dual-labeled fluorogenic probes for real-time PCR. ATTO 680 can be used as a substitute for Alexa Fluor® 680 and Cy5.5™; particularly where enhanced photostability is desired. Fluorescing in the red region of the visible spectrum, ATTO 680 can be effectively quenched by BHQ®-3 dye.

Properties:

  • Formula:

    C33H44N4O9PS

  • Molecular Weight:

    703.76

  • Absorption Maximum (Lambda Max):

    680

  • Extinction Coefficient at Lambda max:

    125000

  • Extinction Coefficient at 260 nm:

    37500

  • Fluorescence Maximum:

    700

Product usage:

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

    687.76

Storage and handling: