Figure 4: Mean relative level of arylalkylamine-N-acetyltransferase (AA-NAT) expression, measured by real-time PCR, in antral and body gastric mucosa in patients with symptomatic H. pylori infection before (control, white bars) and after (black bars) eradication of the bacterium with pantoprazol (40 mg), amoxicillin (1000 mg) and levofloxacin (500 mg) given for 14 days. Error bars denote SD; for each group; , compared with the control.