SLC22A12 and hypouricemia, renal: Renal hypouricemia (RHUC) is now classified into two groups: RHUC1 [OMIM #220150], which results from a mutation in the SLC22A12 [OMIM *607096], encoding for renal urate transporter 1 (URAT1), and RHUC2 [OMIM #612076], which results from a mutation in the SLC2A9 [OMIM *606142], encoding for glucose transporter (GLUT9) (2).