X-GAL, 1g (C003B-138819)

Chromogenic substrate of β-Galactosidase used in combination with IPTG for detection of β-Galactosidase activity in bacterial colonies. X-GAL is cleaved at the B1-4 bond between galactose and the 5-Bromo-4-chloro-3-indolyl portion of X-GAL by β-Galactosidase via hydrolysis. The cleavage of X-GAL results in the production of a water insoluble blue dichloro-dibromo-indigo precipitate. In cloning strategies with vectors such as Lambda-11, M13mp18 and 19, pUC18 and 19, pUR222 the E. coli lacZ gene is transformed to lac+ cells. After transformation the cells show β-Galactosidase activity in the presence of media containing X-GAL and IPTG. The insertion of a DNA fragment into the cloning sites of the lacZ gene results in the disruption of β-Galactosidase activity leading to the appearance of white colonies. Non-recombinant cells produce a blue indigo dye. Water Content: 0.05% (King Fisher) Protect from light and moisture.

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UPC:

41106202

Condition:

New

Weight:

1.00 Ounces

HazmatClass:

No"

Quantity:

1

Unit of Measurement:

EA

WeightUOM:

LB

MPN:

B71800-1.0

Model Number:

C802J10

Temperature Control Device:

Yes

CAS:

7240-90-6