Figure 4.

 Expression of inducible nitric oxide synthase (iNOS) mRNA in biopsies from colonic mucosa of patients with uninflamed bowel, collagenous colitis, or active ulcerative colitis determined by a microarray system and quantified by densitometry. Data were normalised by dividing individual densitometric values with the mean value of all housekeeping genes provided with the array. In the scatterplot, the logarithmic y axis denotes normalised iNOS mRNA expression, with group medians displayed as horizontal lines. *p<0.05 by one way ANOVA and Tukey’s test compared with uninflamed bowel.