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Ex. 22 Enzymatic Attacks on Nitrogen Containing Substrates. Enzymes that attack “N” substrates. 1. Urease 2. Gelatinase 3. Nitrate Reductase. Urease Urea + water ammonia + carbon dioxide Urea Broth Urea pH Indicator Acidic = Yellow Basic = Pink.
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Enzymes that attack “N” substrates • 1. Urease • 2. Gelatinase • 3. Nitrate Reductase
Urease Urea + water ammonia + carbon dioxide Urea Broth Urea pH Indicator Acidic = Yellow Basic = Pink
Gelatinase Gelatin (solid) Gelatin (liquid) Tryptic Soy Gelatin Agar
Nitrate Reductase Nitrate Nitrite + water Facultative Bacteria Nitrate Broth