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Products A To Z | X_products

Shop the extensive GoldBio catalog alphabetically.
Displaying 1-14 of 14 results.
X-α-L-fucopyranoside
Catalog ID
Size
Pricing
More Info
X-α-L-fucopyranoside product image
B-360-100
100 mg
$ 93.00
B-360-250
250 mg
$ 164.00
B-360-500
500 mg
$ 258.00
B-360-1
1 g
$ 413.00
Description

α-L-Fucosidases are carbohydrate-processing enzymes belonging to the exoglycosidase family of glycoside hydrolases. These enzymes break down glycosidic bonds of sugars at the terminal ends. Fucose –containing glycolipids and glycoproteins can accumulate in different tissues when α-L-Fucosidase is inactive.

X-α-L-fucopyranoside is used as a chromogenic substrate for α-L-Fucosidase, producing a blue precipitate.

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Specifications
CAS Number 171869-92-4
Technical Resources
X-β-D-fucopyranoside
Catalog ID
Size
Pricing
More Info
X-β-D-fucopyranoside product image
B-370-50
50 mg
$ 301.00
B-370-100
100 mg
$ 377.00
B-370-250
250 mg
$ 589.00
B-370-500
500 mg
$ 736.00
Description
5-Bromo-4-chloro-3-indoxyl-β-D-fucopyranoside MOLECULAR BIOLOGY GRADE C14H15BrClNO5 MW: 392.64 g/mol X-β-D-Fucoside is a white to slightly off-white powder that is a chromogenic substrate for β-D-fucosidase, yielding a blue precipitate. Storage/Handling: Store at -20°C, and protect from light. View product page →
Specifications
CAS Number 17016-46-5
Technical Resources
X-alpha-D-mannoside
Catalog ID
Size
Pricing
More Info
X-alpha-D-mannoside product image
B-450-1
1 g
$ 437.00
B-450-2.5
2.5 g
$ 770.00
B-450-5
5 g
$ 1084.00
B-450-10
10 g
$ 1527.00
Description

X-alpha-D-mannoside (or X-Man) is a derivative of alpha-D-mannopyranoside and is used in histochemical staining to detect the presence of α-mannosidase.In the presence of α-mannosidase, X-Man forms a granular blue precipitate.

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Specifications
CAS Number 125229-64-3
Technical Resources
X-Gal
Catalog ID
Size
Pricing
More Info
X-Gal product image
X4281C
1 g
$ 39.00
X4281C10
10 g
$ 216.00
Description

5-Bromo-4-chloro-3-indolyl β-D-galactopyranoside is most commonly known as X-Gal. X-gal is a histochemical substrate for β-galactosidase which cleaves X-Gal to yield an insoluble blue precipitate.

X-Gal is a mainstay in molecular biology cloning applications in which it is used to detect the activity of β-galactosidase. X-Gal is used to detect the insertion of foreign DNA into the lacZ region of a plasmid DNA. Insertion of DNA into the lacZ region results in the loss of β-galactosidase activity. Bacteria cells that retain active β-galactosidase will result in characteristic blue colonies. Successful disruption of the lacZα gene disrupts the α-complementation of the β-galactosidase gene and the precipitate does not form, resulting in white colonies.

Many other applications also use X-Gal as a substrate to detect β-galactosidase activity. These include β-galactosidase -antibody linked immunoassays and immunohistochemistry, coliphage detection based on β-galactosidase induction and the detection of micrometastasis formation during tumor progession.

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Specifications
CAS Number 7240-90-6
Technical Resources
X-gluc (CHX salt)
Catalog ID
Size
Pricing
More Info
X-gluc (CHX salt) product image
G1281C
100 mg
$ 43.00
G1281C1
1 g
$ 162.00
G1281C2
2 x 1 g
$ 311.00
G1281C3
3 x 1 g
$ 445.00
G1281C4
4 x 1 g
$ 530.00
G1281C5
5 g
$ 615.00
Description

X-Gluc is a chromogenic substrate for beta-glucuronidase (GUS) which is encoded by the gusA (uid A) gene, a widely used reporter gene. Glucuronidase cleaves X-Gluc to produce colorless glucuronic acid and an intense blue precipitate. X-Gluc is often used in GUS staining of plant cells and tissue and in infections caused by E. coli.

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Specifications
CAS Number 114162-64-0
Technical Resources
X-pal
Catalog ID
Size
Pricing
More Info
X-pal product image
B-470-100
100 mg
$ 109.00
B-470-250
250 mg
$ 207.00
B-470-500
500 mg
$ 350.00
Description
X-pal is an off white to light brownish powder that is used as a chromogenic substrate for carboxylesterase. X-pal yields a blue precipitate when cleaved.Product SpecificationX-pal 5-Bromo-4-chloro-3-indoxyl palmitateMOLECULAR BIOLOGY GRADEFormula: C24H35BrClNO2MW: 484.91 g/molStorage/Handling: Store at -20°C. Protect from light.PubChem Chemical ID: 2733918 View product page →
Specifications
CAS Number 341972-98-3
Technical Resources
X-sulfate K
Catalog ID
Size
Pricing
More Info
X-sulfate K product image
B-520-1
1 g
$ 342.00
B-520-2.5
2.5 g
$ 789.00
B-520-5
5 g
$ 1427.00
B-520-10
10 g
$ 1903.00
Description
X-Sulfate potassium salt; 5-Bromo-4-chloro-3-indoxyl sulfate, potassium salt MOLECULAR BIOLOGY GRADE C8H4BrClNO4SK MW: 364.65 g/mol X-Sulfate K is a slightly off-white to faint-yellowish powder that is used as a chromogenic substrate for aryl-sulfatase. X-Sulfate K yields a blue precipitate when cleaved. Store at -20°C. Protect from light. Sensitive to moisture. Keep under inert gas. View product page →
Specifications
CAS Number 6578-07-0
Technical Resources
X-α-Gal
Catalog ID
Size
Pricing
More Info
X-α-Gal product image
XA250
250 mg
$ 76.00
XA500
500 mg
$ 141.00
XA1
1 g
$ 216.00
XA5
5 g
$ 879.00
XA10
10 g
$ 1489.00
Description

X-α-Gal is a chromogenic substrate for α-galactosidase, yielding a blue precipitate. X-α-Gal is used for detecting two-hybrid interactions directly on the culture media. This substrate eliminates the need for β-galactosidase liquid and filter-lift assays in two-hybrid analysis.
Used for species differentiation within the family Enterobacteriaceae and differentiation of Bifidobacteria species from Lactobacilli species.

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Specifications
CAS Number 107021-38-5
Technical Resources
Xanthine
Catalog ID
Size
Pricing
More Info
X-920-500
500 g
$ 354.00
X-920-1
1 kg
$ 644.00
X-920-2.5
2.5 kg
$ 1464.00
X-920-5
5 kg
$ 2662.00
Description
Xanthine is a purine base found in human body tissue and fluid. Caffeine and theobromine are derived from xanthine. Xanthine is created from guanine by guanine deaminase, hypoxanthine from xanthine oxidoreductase and xanthosine by purine nucleoside phosphorylase, and is converted to uric acid by xanthine oxidase. Derivatives of xanthine are alkaloid used as bronchodialtors and stimulants. Methylated xanthines include aminophylline, paraxanthine, and theophylline. They act as phosphodiesterase inhibitors, raising intracellular cAMP, activate PKA, inhibit TNF-alpha and leukotriene synthesis and reduce inflammation and immunity. Other applications include tumorigenisis inhibitor synthesis and P2X7 receptor inhibitors. Product SpecificationsXanthine;2,6-Dihydroxypurine;Xanthin;IsoxanthineFormula: C5H4N4O2 MW: 152.11 g/molStorage/Handling: Store View product page →
Specifications
CAS Number 69-89-6
Technical Resources

No resources are available for this product.

XCL1, Human
Catalog ID
Size
Pricing
More Info
XCL1, Human product image
2120-01-5
5 μg
$ 66.00
2120-01-20
20 μg
$ 102.00
2120-01-1000
1000 μg
$ 1536.00
Description
GoldBio growth factors are manufactured for RESEARCH USE ONLY and cannot be sold for human consumption! Recombinant Human Chemokine (C motif) Ligand 1 (XCL1) Lymphotactin (LTN, LPTN) Small Inducible Cytokine Subfamily C Member 1 (SCYC1) Single Cysteine Motif 1 (SCM1, SCM1A) Activation Induced T-Cell-Derived And Chemokine Related (ATAC) XCL1 is a chemokine lacking the first and third conserved cysteine residues usually found in chemokines. It is expressed in thymic and peripheral blood CD8+ T-cells and in natural killer cells. Highest levels of expression are seen in spleen, thymus, small intestine, and peripheral blood leukocytes. XCL1 is chemotactic for natural killer cells View product page →
Specifications
CAS Number
Technical Resources
XTT Sodium Salt
Catalog ID
Size
Pricing
More Info
XTT Sodium Salt product image
X-200-100
100 mg
$ 95.00
X-200-500
500 mg
$ 465.00
X-200-1
1 g
$ 825.00
Description

XTT sodium salt is used in the XTT colormetric assay and assists in identifying metabolic activity within cells. In the XTT assay, the metabolic activity of cells reduces XTT sodium salt to an orange color formazan dye by dehydrogenase enzymes. Dye conversion will only occur in viable cells.

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Specifications
CAS Number 111072-31-2
Technical Resources
Xylene Cyanol FF, Ultra Pure
Catalog ID
Size
Pricing
More Info
Xylene Cyanol FF, Ultra Pure product image
X-300-1
1 g
$ 14.00
X-300-5
5 g
$ 30.00
Description
Xylene cyanol FF is commonly used as a tracking dye in DNA gels and runs at approximately the same rate as a 4 kb DNA fragment on a 1% agarose gel.Product Specifications Xylene Cyanol FF, Ultra PureFormula: C25H27N2O6S2NaMW: 538.61 g/mol Storage/Handling: Store in a dry and well-ventilated place. PubChem Chemical ID: 57376446 View product page →
Specifications
CAS Number 2650-17-1
Technical Resources
Xylenol blue
Catalog ID
Size
Pricing
More Info
Xylenol blue product image
X-040-50
50 g
$ 292.00
X-040-100
100 g
$ 531.00
X-040-250
250 g
$ 1187.00
X-040-500
500 g
$ 2158.00
Description
Xylenol Blue is a useful alternative to thymol blue developed in the 1920s. Xylenol Blue can be used at half the concentration that thymol blue requires. It is functional at the same two pH ranges, acidic (pH 1-3), which transitions from red to yellow, and basic (pH 8-10), which transitions from yellow to blue. Xylenol Blue may be substituted for any experiment that requires thymol blue. Product Specifications: Xylenol Blue; 1,4-Dimethyl-5-hydroxybenzenesulfonphthalein p-Xylenolsulphonephthalein MOLECULAR BIOLOGY GRADE C 23H22O5S MW: 410.49 g/mol Storage/Handling: Store desiccated at room temperature.PubChem Chemical ID: 67172 View product page →
Specifications
CAS Number 125-31-5
Technical Resources
Xylitol
Catalog ID
Size
Pricing
More Info
X-740-25
25 kg
$ 560.00
Description
Xylitol is a sugar alcohol typically used as a sweetener. In humans it is typically seen to cause remineralization of teeth along with the reduction in cavities. It also is absorbed less than typical sucrose and carries a lower calorie content. Xylitol inhibits the growth of Streptococcus pneumonia and attachment of Haemophilus influenza on nasopharyngeal cells. Product SpecificationsXylitol;Ribitol;Adonitol;XyliteFormula: C5H12O5 MW: 152.15 g/molStorage/Handling: Store at room temperature in well-sealed container.PubChem Chemical ID: 6912 View product page →
Specifications
CAS Number 87-99-0
Technical Resources

No resources are available for this product.