the activity of angiotension converting enzyme (ace; omim: 106180) in different brain regions of patients with schizophrenia changed, suggesting a possible involvement of ace in psychiatric disorders. genetic polymorphism of insertion/deletion (i/d; dbsnp rs4646994) in the gene encoding ace has been well defined.the present case-control study was performed on 363 (268 males, 95 females) in-pati...