Biotin-PEG4-STF Ester

Catalog#
Unit Size
Price (USD)
Availability
Qty
1404-5
5 mg
$95.00
In stock
1404-25
25 mg
$245.00
In stock
1404-100
100 mg
$895.00
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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Biotin-PEG4-NHS Ester

An activated ester for biotinylation of primary amine-containing molecules.

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