This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
Defect in renal glucosuria- 
Select and explain. 
A. a) GLUT 1, B. b) GLUT 2, C. c) SGLT 1, D. d) SGLT 2
D: d) SGLT 2
Answer: D: d) SGLT 2 
Explanation: Renal Glucosuria- Isolated glucosuria in the presence of a normal blood glucose concentration is due to mutations in SLC5A2, the gene that encodes the high-capacity sodium - glucose co-transpoer SGLT2 in the proximal renal tubule.