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Invitrogen Molecular biology grade, 0.5 M EDTA, pH 8.0 solution is supplied in one bottle. The solution is certified RNase-free, economical, and ready-to-use.
Stabilize enzymes and other proteins which possess free sulfhydryl groups with DTT, shown to restore activity lost by oxidation of these groups in vitro.
Effectively screen colonies with X-Gal, an inert chromogenic substrate for beta-galactosidase which hydrolyzes X-Gal, forming an intense blue precipitate.
UltraPure™ Phenol:Chloroform:Isoamyl Alcohol (25:24:1, v/v) is used in the purification of nucleic acids. This reagent consists of highly pure chloroform, isoamyl alcohol, and UltraPure™ Phenol saturated with Tris-HCl.
UltraPure Dithiothreitol (DTT, Cleland's reagent), which reduces disulfides to their corresponding thiols, is used at low concentrations to stabilize enzymes containing free sulfhydryl groups.
Sheared Salmon Sperm DNA is a very effective blocking agent when used in Northern prehybridization and hybridization buffers at a concentration of 100 to 200 μg/mL.
X-Gal (5-bromo-4-chloro-3-indolyl-β-D-galactoside) is a histochemical substrate for β-galactosidase. This substrate yields a blue precipitate upon hydrolysis, making it suitable for use in immunoblotting or immunocytochemical assays.
IPTG (isopropylthio-β-galactoside), a structural non-metabolizable analogue of allolactose, is an inducer of β-galactosidase activity in bacteria and is suitable for use with X-Gal or Bluo-Gal to detect lac gene activity in cloning procedures.