Hyperammonemia (from 28 ± 7.4 μM in control, n = 5, to 120 ± 12.7 μM at 18 h and 24 h, n = 3 and 5, respectively) and increased alanine aminotransferase (ALT) level (from 84 ± 35 U/L in control, n = 5, to 984 ± 220 U/L at 18 h, n = 5, and 1366 ± 153 U/L at 24 h, n = 3) were evident at 18 h after AOM injection (Fig. 1B). The gene discussed is GPT; the disease is infectious otitis media.