Substrate fluorigenic

Other chromogenic substrates can also be exploited, including phenolphthalein monophosphate, thymophthalein monophosphate, P glycerophosphate, and uridine phosphate. Fluorigenic substrates can also be used such as P-naphthyl phosphate, 4-methylumbelliferyl phosphate, and 3-o-methylfluorescein monophosphate (21). 

Methyl 2,3,4-tri-Q-acetyl-)0-D-glucuronat-l-yl fluoride has been used to obtain the uronosides of p-nitrophenol, 4-methylumbelliferone and 4-trifluoromethylumbelliferone, and the 0-D-galactopyranoside of this last compound, which is a fluorigenic substrate for -galactosidase studies, has also been reported. a-L-Arabinofuranosides of a- and jc -pellatins and a -cellobioside of the latter have been made as have the a- and -naphthyl... 

The assay for 3Gal generally relies on the substrates that produce chromogenic (e.g., 2-nitrophenol and 2,4-DNP) or fluorigenic (e.g., 4-methyl-umbelliferone) products (19). 

Holzapfel-Pschom, A. Obst, U. Haberer, K. Sensitive methods for the determination of microbial activities in water samples using fluorigenic substrates. Fresenius Z Anal. Chem. 1987,327,521-523. 

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