the enzymes used in the identification of gram negative bacteria belonging to the families of enterobacteriaceae , vibrionaceae , parvobacteriaceae , pseudomonadaceae and to the genera alteromonas , xanthomonas , alkaligenes , flavobacterium are classified arbitrarily by the author into enzymes essential for the diagnosis of the family ( oxidase , nitratase ) , enzymes useful in the diagnosis of the genus or the species ( onpg-hydrolase , urease , oxidative desaminase , lysine decarboxylase and ornithine , arginine dihydrolase , thiosulphate reductase , pectinase ) , and into enzymes sought to confirm the diagnosis ( tetrathionate reductase , gelatinase , lipase , dnase , amylase , beta-xylosidase , lecithinase ) .
C0020289
hydrolase
C0031671
lecithinase