ACE2 and diabetes mellitus: Transplant patients with diabetes (n = 38) had significantly higher levels of urinary ACE2 activity, compared to non-diabetic (n = 62) subjects [Figure 2A: diabetics; 8.75 (IQR, 3.09–15.54) vs non-diabetics; 2.32 (IQR, 0.63–5.37) ng-eq/mg Cr×102; p<0.001].