Product Overview
CAS number 367-93-1
Molecular weight C9H18O5S = 238.3
Assay > 98.5 %
Water Spec. Opt. Rot. (-) 31 - 33
Isopropyl-ß-D-thiogalactoside; IPTG is a chemical analogue of galactose that cannot be cleaved by ß-galactosidase. Functioning as an analogue; IPTG binds and inhibits the powerful lac repressor; strongly inducing the production of ß-galactosidase..IPTG is used in conjunction with X-Gal for detection of lac+ colonies or cells in a colorimetric assay; in order to distinguish recombinants (white) from non recombinants (blue) in cloning strategies using vectors like Lamb-da-11; M13m-p18 and 19; pUC18 and 19; pUR222 containing the lacZ gene. For more detailed information see X-Gal.