Welcome to Gold Biotechnology, a Saint Louis based biotech company. For over thirty years we have endeavored to provide life scientists around the world access to the best reagents for the best price.

Here, you will find information and discounts exclusive only to you. If you have any questions or you would like more information, contact your personal representative Maddie. She is looking forward to working with you and is here to ensure your needs are met.

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Email Maddie

Hi I’m Maddie, your GoldBio account manager! I studied Biology and Chemistry at Fontbonne University, a college smaller than most high schools. After spending my whole life in St. Louis, I am thrilled to have a traveling job after college. Now I get to combine my love for traveling with my passion for science- I guess you could say… I’m in my element!

If you would like a quote, want to place an order, or hear a cheesy science pun please give me a call at 314-479-2424 or send me an email. Thanks!


Maddie Cooksey

GoldBio Account Manager


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100 bp DNA Ladder

Catalog ID Size Pricing
D001-500 500 µL $ 49.00
D001-1000 2 x 500 μL $ 95.00
D001-1500 3 x 500 μL $ 135.00
D001-2000 4 x 500 μL $ 169.00
D001-2500 5 x 500 μL $ 189.00
D001-3000 6 x 500 μL $ 215.00


A unique combination of PCR products and a number of proprietary plasmids digested with appropriate restriction enzymes to yield 11 fragments, suitable for use as molecular weight standards for agarose gel electrophoresis. The DNA includes fragments ranging from 100-1,500 base pairs. The 500 and 1,500 base pair bands have increased intensity to serve as reference points. The approximate mass of DNA in each band is provided (0.5 μg a load) for approximating the mass of DNA in comparably intense samples of similar size. The ladder is ready-to-use, and is premixed with loading buffer dye for direct loading on gel.

Product Specifications

Catalog ID D001
Storage/Handling Store at room temperature for 6 months. Store at -20°C for 24 months.
Packs & Pricing
D001-500 In stock 500 µL $ 49.00
D001-1000 In stock 2 x 500 μL $ 95.00
D001-1500 In stock 3 x 500 μL $ 135.00
D001-2000 In stock 4 x 500 μL $ 169.00
D001-2500 In stock 5 x 500 μL $ 189.00
D001-3000 In stock 6 x 500 μL $ 215.00

BLUEstain™ Protein ladder, 11-245 kDa

Catalog ID Size Pricing
P007-500 500 µL $ 120.00
P007-1000 2 x 500 μL $ 235.00
P007-1500 3 x 500 μL $ 345.00
P007-2000 4 x 500 μL $ 445.00
P007-2500 5 x 500 μL $ 540.00
P007-3000 6 x 500 μL $ 625.00


The BLUEstain™ Protein ladder is a three-color protein standard with 12 prestained proteins covering a wide range molecular weights from ~11 to 245 kDa. Proteins are covalently coupled with a bluechromophore except for two reference bands (one green and one red band at 25 kDa and 75 kDa respectively) when separated on SDS-PAGE (Tris-glycine buffer). The BLUEstain™ Protein ladder, is designed for monitoring protein separation during SDS-polyacrylamide gel electrophoresis, verification of Western transfer efficiency on membranes (PVDF, nylon, or nitrocellulose) and for approximating the size of proteins. The ladder is supplied in gel loading buffer and is ready to use.

Product Specifications

Catalog ID P007
Storage/Handling Store at 4°C for 3 months. Store at -20°C for 24 months.
Packs & Pricing
P007-500 In stock 500 µL $ 120.00
P007-1000 In stock 2 x 500 μL $ 235.00
P007-1500 In stock 3 x 500 μL $ 345.00
P007-2000 In stock 4 x 500 μL $ 445.00
P007-2500 In stock 5 x 500 μL $ 540.00
P007-3000 In stock 6 x 500 μL $ 625.00

Agarose LE (Molecular Biology Grade)

Catalog ID Size Pricing
A-201-100 100 g $ 125.00
A-201-500 500 g $ 415.00
A-201-1000 1 kg $ 705.00


Agarose LE (Low Electroendosmosis) is Molecular Biology Grade and is specifically designed for the superior separation of nucleic acids, with maximally crisp band resolution, and is also ideal for cloning and cloning related experiments.

GoldBio Agarose LE is refined in an advanced process that excludes the use of organic solvents. The result is a cleaner end-product with significantly reduced environmental impact. The agarose can be used for analyses of nucleic acids from 50 bp to 25 kbp, protein electrophoresis and various blotting protocols.

The low EEO of the agarose promotes increased electrophoretic mobility, yielding improved resolution and shorter run times. This also allows macromolecules and larger particles (subcellular fragments, viruses, etc.) to migrate more freely through the gel matrix. The consistently low EEO reduces band distortion (caused by counterflow) that can result from the presence of excessive sulfate-rich negative ions.

Agarose is a natural product that forms an inert matrix used in electrophoresis, chromatography and other molecular biology and biochemistry techniques. Likewise, it is neutral and easily derivatizable, so it is easy to bind to its structure proteins like enzymes, antigens or antibodies. Toxicity absence makes working with agarose very convenient.

Product Specifications

Catalog ID A-201
CAS # 9012-36-6
Storage/Handling Store at room temperature.
Packs & Pricing
A-201-100 In stock 100 g $ 125.00
A-201-500 In stock 500 g $ 415.00
A-201-1000 In stock 1 kg $ 705.00

DTT (Dithiothreitol) (> 99% pure) Protease free

Catalog ID Size Pricing
DTT10 10 g $ 65.00
DTT25 25 g $ 135.00
DTT50 50 g $ 239.00
DTT100 100 g $ 385.00
DTT500 500 g $ 1,715.00


Dithiothreitol (DTT) is the common name of the more popular of the two Cleland’s Reagents (the other being Dithioerythritol or DTE). DTT is a powerful reducing agent that forms a stable six-membered ring with an internal disulfide bond which is resistant to oxidation. DTT is often used for the following: reducing the disulfide bridge of the cross-linker N,N′-bis(acryloyl) cystamine to break apart the matrix of a polyacrylamide gel, the reduction of disulfide bonds in proteins, the prevention of those bonds from forming between cysteine residues and lastly, DTT is often used to reduce thiolated DNA in order to minimize dimerization.

DTT is a nearly 7-fold stronger reduction agent than βME (β-mercaptoethanol) and has a less offensive odor and is less toxic.

Product Specifications

Catalog ID DTT
Name(s) DTT, DL-Dithiothreitol (Clelands Reagent),
(2 S,3S)-1,4-bis(sulfanyl)butane-2,3-diol,
D- threo-1,4-dimercapto-2,3-butanediol
CAS # 27565-41-9 / 3483-12-3
Formula C4H10O2S2
MW 154.25 g/mol
PubChem Chemical ID 19001
Storage/Handling Store desiccated at -20°C.
Packs & Pricing
DTT10 In stock 10 g $ 65.00
DTT25 In stock 25 g $ 135.00
DTT50 In stock 50 g $ 239.00
DTT100 In stock 100 g $ 385.00
DTT500 In stock 500 g $ 1,715.00


Catalog ID Size Pricing
TCEP1 1 g $ 29.00
TCEP2 2 g $ 49.00
TCEP5 5 g $ 89.00
TCEP10 10 g $ 145.00
TCEP25 25 g $ 289.00
TCEP50 50 g $ 529.00
TCEP100 100 g $ 1,035.00


TCEP-HCl is an odorless reducing agent suitable for protein applications and in the preparation for electrophoresis. TCEP is water soluble, is stable in a variety of solutions and is particularly useful in the labeling of cysteine residues with maleimides, preventing the cysteines from forming disulfide bonds. As a reducing agent, TCEP has many other desirable features.

Product Specifications

Catalog ID TCEP
Name(s) TCEP-HCl;
Tris (2-Carboxyethyl) phosphine Hydrochloride
CAS # 51805-45-9
Grade Molecular Biology Grade
Formula C9H15O6P • HCl
MW 286.65 g/mol
PubChem Chemical ID 2734570
Storage/Handling Store desiccated at -20°C.
Packs & Pricing
TCEP1 In stock 1 g $ 29.00
TCEP2 In stock 2 g $ 49.00
TCEP5 In stock 5 g $ 89.00
TCEP10 In stock 10 g $ 145.00
TCEP25 In stock 25 g $ 289.00
TCEP50 In stock 50 g $ 529.00
TCEP100 In stock 100 g $ 1,035.00

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