Product Code Pack Size Sterling Euros Dollars      38045  10g  £85  €132  $174   p-Nitrophenyl β-D-galactopyranoside p-Nitrophenyl beta-D-galactopyranoside; 4-Nitrophenyl beta-D-galactopyranoside; p-Nitrophenyl beta-D-galactoside; PNPG; PNP beta-D-galactopyranoside CAS: 3150-24-1 MF: C12H15NO8 MW: 301.30 >98% [HPLC]. Free PNP < 200ppm. Chromogenic substrate for beta-galactosidase: A. Akira et al., J. Ferment. Technol., 59, 325 (1981); B.G. Hall, Biochemistry, 20, 4042 (1981).