Biotin-PEG4-STP Ester

Catalog#
Unit Size
Price (USD)
Availability
Qty
1404-5
5 mg
$115.00
In stock
1404-25
25 mg
$295.00
In stock
1404-100
100 mg
$970.00
In stock

    Biotin-PEG4-STP Ester (4-Sulfo-2,3,5,6-tetrafluorophenyl ester) is an amine-reactive, water-soluble labeling reagent used to modify proteins, antibodies, and other amine-containing biopolymers in 100% aqueous media. The hydrophilic polyethylene glycol (PEG) spacer arm of this reagent imparts water solubility that is transferred to the labeled molecule, thus reducing aggregation of labeled proteins stored in solution. The PEG spacer arm also gives the reagent a long and flexible connection to minimize steric hindrance involved with binding to avidin molecules.

    Molecular weight
    719.72
    Chemical composition
    C27H37F4N3O11S2
    CAS
    N/A
    Solubility
    DMSO, DMF, Water
    Purity
    >90%
    Appearance
    White to grey amorphous solid
    Storage conditions
    -20°C. Desiccate
    Shipping conditions
    Ambient temperature

    Biotin-PEG4-STP Ester (4-Sulfo-2,3,5,6-tetrafluorophenyl ester) is an amine-reactive, water-soluble labeling reagent used to modify proteins, antibodies, and other amine-containing biopolymers in 100% aqueous media. The hydrophilic polyethylene glycol (PEG) spacer arm of this reagent imparts water solubility that is transferred to the labeled molecule, thus reducing aggregation of labeled proteins stored in solution. The PEG spacer arm also gives the reagent a long and flexible connection to minimize steric hindrance involved with binding to avidin molecules.

    STP esters undergoes hydrolysis in aqueous media at much slower rate compared to NHS esters allowing for more efficient labeling of biomolecules in aqueous media. Biotin-PEG4-STP Ester reacts readily with primary amines to give the same acylation products as NHS and pentafluorophenyl (PFP) esters.

    Enter only one — either volume or amount of protein to be labeled
    Enter only one — either maximum concentration of DMSO or volume DMSO added to label
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