Correlogram for genes encoding L-arginine/NO pathway enzymes: (a) in quiescent large bowel from patients with Crohn’s disease; (b) in inflamed large bowel from patients with Crohn’s disease; (c) in inflamed large bowel from patients with ulcerative colitis. Results presented as correlation coefficients r and analyzed on log-transformed data using Pearson’s correlation test; a
p < 0.05; b
p < 0.01; c
p < 0.001; d
p < 0.0001; ns, non-significant; ARG, arginase; DDAH, dimethylarginine dimethylaminohydrolase, NOS, nitric oxide synthase; ODC, ornithine decarboxylase; PRMT, arginine N-methyltransferase.