Fig. 4From: Identification of a Yarrowia lipolytica acetamidase and its use as a yeast genetic markerAcetamide titration. Strains YB-392, NS995, and NS996 were streaked on defined media containing no added nitrogen source, acetamide as the sole nitrogen source, or ammonium sulfate as the sole nitrogen source in the concentrations shown. Plates were incubated at 30 °C for 2–4 daysBack to article page