There was no difference in plasma ACE2 levels between patients with ST elevation acute coronary syndrome (ACS) [n = 24, median 31.7 pmol/ml/min (IQR 5.6–43.9)], non-ST elevation ACS [n = 27, median 29.1 pmol/ml/min (IQR 23.1–46.4)] or stable angina [n = 28, median 26.7 pmol/ml/min (IQR 18.7–39.8), p = 0.386] and so further analysis was conducted in the whole cohort. The gene discussed is ACE2; the disease is angina pectoris.