OR2A4 and diabetes mellitus: In this sense, the diagnosis of some diseases associated with impaired wound healing can be made through high levels of SERPINB3 (Serpin Peptidase Inhibitor, Clade B, Member 3) and low levels of OR2A4 (Olfactory Receptor Family 2 Subfamily A Member 4) and LGR5 (Leucine-Rich Repeat-Containing G-Protein Coupled Receptor 5) molecular markers, which differentiate the skin of patients with diabetes [41].