Biotin‐PEG4‐NHS Ester is a pegylated, highly hydrophilic biotinylation reagent for simple and efficient biotin labeling of antibodies, proteins and other primary amine-containing biomolecules.

Biotin‐PEG4‐NHS Ester reacts specifically and efficiently with primary amines (e.g., side chain of lysine residues or aminosilane-coated surfaces) at pH 7-9 to form covalent bonds. 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.Formula: C₂₅H₄₀N₄O₁₀S

MW: 588.67 g/mol

Net Mass Addition: 473.22 g/mol

Spacer Arm: 29Å

Storage/Handling: Store at -20°C. Product shipped at ambient temperature. Soluble in water at 10 mg/ml.

Highlights:- A highly hydrophilic biotinylation reagent amine reactive biotinylation reagent. - Biotin‐PEG4‐NHS Ester increases solubility and eliminates aggregation of labeled molecules. - Extended PEG4 spacer arm reduces steric hindrance for optimal streptavidin binding. - High purity, solid biotin labeling reagents can be used to create high-quality biotin-labeled derivatives biotinylation reagents

IPTG, X-Gal and X-Gluc

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没错！最开始，Gold Biotechnology只生产这三个产品，30年后的今天，Goldbio的产品已经超过3000种，涵盖：

琼脂糖树脂

抗生素

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缓冲液

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DNA蛋白质电泳

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目前Goldbio最核心的产品是：荧光素钾盐，X-gluc， 双丙氨磷，草胺磷 和 X-α-gal