o-Nitrophenyl beta-D-galactopyranoside

Pack Size Pack Price No. of packs 10g £40.00 25g £63.75 50g £110.00 Order

TLC one major spot. Free ONP < 300ppm. Rotation [α]_D -68^o to -72^o.

Substrate for beta-galactosidase: S.A. Kuby and H.A. Lardy, J. Amer. Chem. Soc., 75, 890 (1953). Used in a membrane filtration method for coliform enumeration: P.G. Morgan, Wat. Sci. Tech., 21, 271 (1989). In a medium for Salmonella screening: F. Berlutti et al., J. Clin. Microbiol., 24, 650 (1986).