Nowadays, the angiotensin converting enzyme (ACE) inhibitors (e.g., Capoten (captopril), Vasotec (enalapril), Prinivil, or Zestril (lisinopril), etc.)have been considered as first-line drugs for the treatment of hypertension and myocardial infarction [5,6]. The gene discussed is ACE; the disease is hypertensive disorder.