isopropylthiogalactoside

i·so·pro·pyl·thi·o·ga·lac·to·side (iPrSGal, IPTG),

(ī'sō-pro'pil-thī'ō-gă-lak'tō-sīd),
An artificial galactoside capable of inducing β-galactosidase in Escherichia coli without being split, as are the natural substrates such as lactose.
References in periodicals archive ?
Transformants were selected in LB-agar plate containing 100 [micro]g of ampicillin, 100 [micro]g of 5-bromo-4-chloro-3-indolyl [beta]-L-fucopyranoside (X-gal), and 200 [micro]g of isopropylthiogalactoside.