X_Products

Showing 1-14 of 14 items.

X-α-Gal

Catalog ID Size Pricing
XA250 250 mg $ 81.00
XA500 500 mg $ 150.00
XA1 1 g $ 229.00
XA5 5 g $ 932.00
XA10 10 g $ 1,579.00

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.

Product Specifications

Catalog ID XA
CAS # 107021-38-5
MW 408.64 g/mol
Grade MOLECULAR BIOLOGY GRADE
Storage/Handling Store at -20°C. Protect from light.
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XA250 250 mg $ 81.00
XA500 500 mg $ 150.00
XA1 1 g $ 229.00
XA5 5 g $ 932.00
XA10 10 g $ 1,579.00

X-α-L-fucopyranoside

Catalog ID Size Pricing
B-360-100 100 mg $ 94.00
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.

Product Specifications

Catalog ID B-360
CAS # 171869-92-4
MW 392.64 g/mol
Grade MOLECULAR BIOLOGY GRADE
Storage/Handling Store at -20°C. Protect from light.
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B-360-100 100 mg $ 94.00
B-360-250 250 mg $ 164.00
B-360-500 500 mg $ 258.00
B-360-1 1 g $ 413.00

X-β-D-fucopyranoside

Catalog ID Size Pricing
B-370-50 50 mg $ 301.00
B-370-100 100 mg $ 377.00
B-370-250 250 mg $ 590.00
B-370-500 500 mg $ 736.00

Description

No description available

Product Specifications

Catalog ID B-370
CAS # 17016-46-5
MW 392.64 g/mol
Grade MOLECULAR BIOLOGY GRADE
Storage/Handling Store at -20°C. Protect from light.
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B-370-50 50 mg $ 301.00
B-370-100 100 mg $ 377.00
B-370-250 250 mg $ 590.00
B-370-500 500 mg $ 736.00

X-Gal

Catalog ID Size Pricing
X4281C 1 g $ 42.00
X4281C10 10 g $ 229.00

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.

Product Specifications

Catalog ID X4281
CAS # 7240-90-6
MW 408.63 g/mol
Grade MOLECULAR BIOLOGY GRADE
Storage/Handling Store at -20°C. Protect from light.
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X4281C 1 g $ 42.00
X4281C10 10 g $ 229.00

X-gluc (CHX salt)

Catalog ID Size Pricing
G1281C 100 mg $ 46.00
G1281C1 1 g $ 172.00
G1281C2 2 x 1 g $ 330.00
G1281C3 3 x 1 g $ 472.00
G1281C4 4 x 1 g $ 562.00
G1281C5 5 g $ 652.00

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.

Product Specifications

Catalog ID G1281
CAS # 114162-64-0
MW 521.79 g/mol
Grade MOLECULAR BIOLOGY GRADE
Storage/Handling Store desiccated at -20°C. Protect from light.
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G1281C 100 mg $ 46.00
G1281C1 1 g $ 172.00
G1281C2 2 x 1 g $ 330.00
G1281C3 3 x 1 g $ 472.00
G1281C4 4 x 1 g $ 562.00
G1281C5 5 g $ 652.00

X-pal

Catalog ID Size Pricing
B-470-100 100 mg $ 109.00
B-470-250 250 mg $ 208.00
B-470-500 500 mg $ 350.00
B-470-1 1 g $ 630.00

Description

No description available

Product Specifications

Catalog ID B-470
CAS # 341972-98-3
MW 484.91 g/mol
Grade MOLECULAR BIOLOGY GRADE
Storage/Handling Store at -20°C. Protect from light.
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B-470-100 100 mg $ 109.00
B-470-250 250 mg $ 208.00
B-470-500 500 mg $ 350.00
B-470-1 1 g $ 630.00

X-sulfate K

Catalog ID Size Pricing
B-520-1 1 g $ 342.00
B-520-2.5 2.5 g $ 789.00
B-520-5 5 g $ 1,427.00
B-520-10 10 g $ 1,903.00

Description

No description available

Product Specifications

Catalog ID B-520
CAS # 6578-07-0
MW 364.65 g/mol
Grade MOLECULAR BIOLOGY GRADE
Storage/Handling Store at -20°C. Protect from light.
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B-520-1 1 g $ 342.00
B-520-2.5 2.5 g $ 789.00
B-520-5 5 g $ 1,427.00
B-520-10 10 g $ 1,903.00

X-alpha-D-mannoside

Catalog ID Size Pricing
B-450-1 1 g $ 437.00
B-450-2.5 2.5 g $ 770.00
B-450-5 5 g $ 1,084.00
B-450-10 10 g $ 1,527.00

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.

Product Specifications

Catalog ID B-450
CAS # 125229-64-3
MW 408.63 g/mol
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B-450-1 1 g $ 437.00
B-450-2.5 2.5 g $ 770.00
B-450-5 5 g $ 1,084.00
B-450-10 10 g $ 1,527.00

Xylenol blue

Catalog ID Size Pricing
X-040-5 5 g $ 35.00
X-040-50 50 g $ 292.00
X-040-100 100 g $ 531.00
X-040-250 250 g $ 1,187.00

Description

No description available

Product Specifications

Catalog ID X-040
CAS # 125-31-5
MW 410.49 g/mol
Grade MOLECULAR BIOLOGY GRADE
Storage/Handling Store desiccated at room temperature.
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X-040-5 5 g $ 35.00
X-040-50 50 g $ 292.00
X-040-100 100 g $ 531.00
X-040-250 250 g $ 1,187.00

XTT Sodium Salt

Catalog ID Size Pricing
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.

Product Specifications

Catalog ID X-200
CAS # 111072-31-2
MW 673.52 g/mol
Grade HIGH PURITY GRADE
Storage/Handling Store at 4°C.
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X-200-100 100 mg $ 95.00
X-200-500 500 mg $ 465.00
X-200-1 1 g $ 825.00

Xylene Cyanol FF, Ultra Pure

Catalog ID Size Pricing
X-300-5 5 g $ 30.00

Description

No description available

Product Specifications

Catalog ID X-300
CAS # 2650-17-1
MW 538.61 g/mol
Storage/Handling Store desiccated at room temperature.
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X-300-5 5 g $ 30.00

XCL1, Human

Catalog ID Size Pricing
2120-01-5 5 μg $ 70.00
2120-01-20 20 μg $ 108.00
2120-01-1000 1000 μg $ 1,628.00

Description

No description available

Product Specifications

Catalog ID 2120-01
MW ~10.2 kDa
Storage/Handling Store desiccated at -20°C.
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2120-01-5 5 μg $ 70.00
2120-01-20 20 μg $ 108.00
2120-01-1000 1000 μg $ 1,628.00

Xylitol

There is no image for Xylitol Xylitol
Catalog ID Size Pricing
X-740-25 25 kg $ 560.00
X-740-50 50 kg $ 1,015.00

Description

No description available

Product Specifications

Catalog ID X-740
CAS # 87-99-0
MW 152.15 g/mol
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X-740-25 25 kg $ 560.00
X-740-50 50 kg $ 1,015.00

Xanthine

There is no image for Xanthine Xanthine
Catalog ID Size Pricing
X-920-250 250 g $ 332.00
X-920-500 500 g $ 554.00
X-920-1 1 kg $ 924.00
X-920-2.5 2.5 kg $ 1,925.00

Description

No description available

Product Specifications

Catalog ID X-920
CAS # 69-89-6
MW 152.11 g/mol
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X-920-250 250 g $ 332.00
X-920-500 500 g $ 554.00
X-920-1 1 kg $ 924.00
X-920-2.5 2.5 kg $ 1,925.00

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