AFDye 555 NHS Ester

Catalog#
Unit Size
Price (USD)
Availability
Qty
1341-1
1 mg
$139.00
In stock
1341-5
5 mg
$395.00
In stock
1341-25
25 mg
$1,395.00
In stock
1341-100
100 mg
$2,595.00
In stock

    AFDye™ 555 NHS Ester is a water-soluble, bright orange-fluorescent dye with excitation ideally suited for the 532 nm or 555 nm laser lines and visualized with TRITC (tetramethylrhodamine) filter sets. AFDye™ 555 conjugates of antibodies, peptides, and proteins are pH insensitive from pH 4 to pH 10. Proteins can be labeled with AFDye 555 NHS Ester at high molar ratios without significant self-quenching, leading to brighter conjugates and more sensitive detection. AFDye™ 555 conjugates ideally suited for detection of low abundance targets.

    Abs/Em Maxima
    555/572 nm
    Extinction Coefficient
    155,000
    Flow Cytometry Laser Line
    532 nm or 555 nm
    Microscopy Laser Line
    532 nm or 555 nm
    Spectrally Similar Dyes
    Alexa Fluor® 555, CF® 555, DyLight® 549, Cy3 Dye
    Molecular weight
    944.07 (protonated), 1247.64 (triethylammonium salt)
    CAS
    N/A
    Solubility
    Water, DMSO, DMF
    Purity
    >95% (HPLC)
    Appearance
    Red solid
    Storage conditions
    -20°C. Desiccate
    Shipping conditions
    Ambient temperature

    AFDye™ 555 NHS Ester is a water-soluble, bright orange-fluorescent dye with excitation ideally suited for the 532 nm or 555 nm laser lines and visualized with TRITC (tetramethylrhodamine) filter sets. AFDye™ 555 conjugates of antibodies, peptides, and proteins are pH insensitive from pH 4 to pH 10. Proteins can be labeled with AFDye 555 NHS Ester at high molar ratios without significant self-quenching, leading to brighter conjugates and more sensitive detection. AFDye™ 555 conjugates ideally suited for detection of low abundance targets.

    The NHS Ester reacts specifically and efficiently with a primary amine at pH 7-9 to form a stable, covalent amide bond. The NHS ester (or succinimidyl ester) is the most popular tool for conjugating dyes to the primary amines of protein or antibody (Lys), amine-modified oligonucleotides, and other amine-containing molecules.

    AFDye™ 555 is spectrally is almost identical to Cy3 Dye, Alexa Fluor® 555, CF® 555 Dye, or any other Cyanine3 based fluorescent dyes.

    Alexa Fluor® 555 is a registered trademark of Thermo Fisher Scientific.

    AFDye555

    1. Lehmann, M., et al. (2020). Molecular and spectroscopic characterization of green and red cyanine fluorophores from the Alexa Fluor and AF series. bioRxiv, 10, 1101. [bioRxiv]
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