The KMO allele encoding Arg452 is associated with psychotic features in bipolar disorder type 1, and with increased CSF KYNA level and reduced KMO expression. - Lavebratt, C; Olsson, S; Backlund, L; Frisén, L; Sellgren, C; Priebe, L; Nikamo, P; Träskman-Bendz, L; Cichon, S; Vawter, M P; Ösby, U; Engberg, G; et al. (Molecular Psychiatry, 2014)