In transplant patients with diabetes, both the 120 kDa and the 90 kDa ACE2 protein bands were significantly increased on westerns, compared to non-diabetics (p = 0.002 vs non-diabetics for the 120 kDa band, and p<0.001 vs non-diabetics for the 90 kDa band). This evidence concerns the gene ACE2 and diabetes mellitus.