We have also identified new urinary biomarkers with additional diagnostic characteristics for AKI diagnosis, including ganglioside M2 activator protein (GM2AP) [26,27], t-gelsolin (i.e., a cleavage product of gelsolin produced by apoptotic caspases) [28,29] and regenerating islet-derived IIIb (REGIIIb) [28], which associate with renal forms of AKI. The gene discussed is GM2A; the disease is acute kidney injury.