Abstract
Six novel fluorogenic enzyme substrates for detecting l-alanylaminopeptidase activity in microorganisms have been prepared and evaluated in Columbia agar media. The substrates are l-alanyl derivatives of 6-amino-2-hetarylquinolines and 7-amino-3-hetarylcoumarins. Both the quinoline and coumarin series of substrates produced fluorescence in the presence of Gram-negative microorganisms. In contrast, fluorescence generation in the presence of the Gram-positive microorganisms and yeasts was limited or absent.
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