Figure 2
Mean (±s.e.m.) levels of l-arginine (a), l-citrulline (b), l-ornithine (c), glutamate (d), glutamine (e), GABA (f), glutamate/GABA ratio (g), glutamine/glutamate ratio (h), agmatine (i), putrescine (j), spermidine (k) and spermine (l) in the frontal cortex (BA8) from non-psychiatric control and schizophrenia cases (n=20 per group). Asterisks indicate significant differences between groups at *P<0.05 or **P<0.01. BA8, Brodmann’s area 8; GABA, γ-aminobutyric acid.
