Affinity Buffers & Washes

Successful affinity purification depends on more than just the resin. GoldBio’s affinity buffers and reagents are designed to support protein binding, washing, elution, and purification steps for common affinity chromatography applications, including His-tag and glutathione-based systems.

From imidazole solutions and buffer sets to PEG and glutathione reagents, this collection provides the essential components researchers need to prepare, optimize, and maintain consistent purification conditions. 

7 products

  • 5X Phosphate Buffer + 3M Imidazole Solution

    5X Phosphate Buffer + 3M Imidazole Solution
    Catalog ID Size Pricing
    I-905-100 100 mL $237.00

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    product description

    This Buffer Set consists of:

    - 5X Phosphate Buffer, pH8 (250 mM Phosphate buffer pH 8, 1.5 M NaCl)- 25 mL 3M Recrystallized Imidazole Solution, pH 6.0

    This Buffer set allows researchers to develop, wash and elute buffers for His-tag protein purification.

    Product Specifications

    Catalog ID: I-905
    Storage/handling : Store at room temperature.
    UN number : 3267
    item class : 8
    group number: III
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    Catalog ID Size Pricing
    I-905-100 100 mL $237.00

    $237.00

  • 5X Phosphate Buffer, pH 8

    5X Phosphate Buffer, pH 8
    Catalog ID Size Pricing
    P-500-50 50 mL $84.00
    P-500-100 100 mL $122.00
    P-500-250 250 mL $164.00

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    product description

    5X Phosphate Buffer, pH8 (250 mM Phosphate buffer pH 8, 1.5 M NaCl).

    Phosphate Buffer, pH8 is a mix of Sodium Phosphate dibasic (Na2HPO4) and Monosodium Phosphate (NaH2PO4). This buffer is the basis for wash and elution buffers for protein purification through His-tag.

    Product Specifications

    Catalog ID: P-500
    Storage/handling : Store at 4°C.
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    Packs & Pricing
    Catalog ID Size Pricing
    P-500-50 50 mL $84.00
    P-500-100 100 mL $122.00
    P-500-250 250 mL $164.00

    $84.00 - $164.00

  • Glutathione reduced ethyl ester

    Glutathione reduced ethyl ester
    Catalog ID Size Pricing
    G-275-500 500 mg $369.00

    Product Specifications

    Catalog ID: G-275
    CAS # : 118421-50-4
    Formula : C12H21N3O6S

    MW : 335.38 g/mol
    Storage/handling : Store at -20°C.
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    Packs & Pricing
    Catalog ID Size Pricing
    G-275-500 500 mg $369.00

    $369.00

  • His-Tag Buffer Set

    His-Tag Buffer Set
    Catalog ID Size Pricing
    I-906-250 1 kit $147.00

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    product description

    His-Tag Buffer Set includes:

    - 250 mL Wash Buffer (50mM Phosphate Buffer pH 8, 300mM NaCl, 10mM Imidazole)- 50 mL Elution Buffer (50mM Phosphate Buffer, 300mM NaCl, 500mM Imidazole)

    Designed for use with Goldbio Nickel and Cobalt Agarose resins, but it can be used with most standard His-tag purification resins.

    Product Specifications

    Catalog ID: I-906
    Storage/handling : Store at room temperature.
    UN number : 3263
    item class : 8
    group number: III
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    Packs & Pricing
    Catalog ID Size Pricing
    I-906-250 1 kit $147.00

    $147.00

  • Imidazole - 3M Recrystallized Solution, pH 6.0

    Imidazole - 3M Recrystallized Solution, pH 6.0
    Catalog ID Size Pricing
    I-901-25 25 mL $94.00
    I-901-50 50 mL $143.00
    I-901-100 100 mL $217.00
    I-901-250 250 mL $483.00

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    product description

    Imidazole is a planar 5-membered ring. It is a highly polar, highly water soluble amphoteric compound. Imidazole is often used to elute tagged proteins bound to metal ions attached to the surface of beads in a chromatography column by displacing the His-tag from the metal ion and freeing the His-tagged proteins.

    Product Specifications

    Catalog ID: I-901
    CAS # : 288-32-4
    MW : 68.08 g/mol
    Storage/handling : Store at 4°C.
    UN number : 3267
    item class : 8
    group number: III
    View
    Packs & Pricing
    Catalog ID Size Pricing
    I-901-25 25 mL $94.00
    I-901-50 50 mL $143.00
    I-901-100 100 mL $217.00
    I-901-250 250 mL $483.00

    $94.00 - $483.00

  • Imidazole, Recrystallized

    Imidazole, Recrystallized
    Catalog ID Size Pricing
    I-902-25 25 g $84.00
    I-902-50 50 g $132.00
    I-902-100 100 g $217.00
    I-902-500 500 g $641.00

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    product description

    Imidazole is a planar 5-membered ring. It is a highly polar, highly water soluble amphoteric compound. Imidazole is often used to elute tagged proteins bound to metal ions attached to the surface of beads in a chromatography column by displacing the His-tag from the metal ion and freeing the His-tagged proteins.

    Product Specifications

    Catalog ID: I-902
    CAS # : 288-32-4
    Formula : C3H4N2
    MW : 68.08 g/mol
    Storage/handling : Store at room temperature.
    UN number : 3263
    item class : 8
    group number: III
    View
    Packs & Pricing
    Catalog ID Size Pricing
    I-902-25 25 g $84.00
    I-902-50 50 g $132.00
    I-902-100 100 g $217.00
    I-902-500 500 g $641.00

    $84.00 - $641.00

  • Polyethylene Glycol (PEG) 3350

    Polyethylene Glycol (PEG) 3350
    Catalog ID Size Pricing
    P-290-5 5 kg $332.00

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    product description

    PEG 3350 is a polyethylene glycol that has an average molecular weight of 3350 g/mol. PEG's are polymers that can be used to precipitate DNA, RNA, proteins and viruses.

    Product Specifications

    Catalog ID: P-290
    CAS # : 25322-68-3
    Formula : OH(CH2-CH2O)n-H
    MW : 3350.00 g/mol
    Grade : BIOTECHNOLOGY GRADE
    Storage/handling : Store desiccated at room temperature.
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    Packs & Pricing
    Catalog ID Size Pricing
    P-290-5 5 kg $332.00

    $332.00

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