Selecting Agents for Cloning


IPTG, genomic grade, >99%

IPTG (Isopropyl-ß-D-thiogalactopyranoside) is a galactose analogue not recognized by ß-galactosidase. IPTG is a non-metabolizable galactose analog that induces expression of the lac operon in Escherichia coli.

Ampicillin, sodium salt

Ampicillin, sodium salt

Ampicillin Sodium Salt


X-Gal, molecular biology grade, 100 mg


X-Gal (5-Bromo-4-Chloro-3-Indolyl-AY-D-galactopyranoside) is a β-galactosidase substrate. In the presence of β-galactosidase, X-Gal is hydrolyzed and yields a blue precipitate.

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