This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Acute Kidney Injury, Subject name: Medicine
All are markers of acute kidney injury except? 
Select and explain. 
A. Clusterin, B. Osteopontin, C. Alanine aminopeptidase, D. Acid phosphatase
D: Acid phosphatase
Answer: D: Acid phosphatase 
Explanation: Acid phosphatase is NOT a marker of AKI, instead, it is alkaline phosphatase. * List of markers for AKI 1. Alanine aminopeptidase 2. Alkaline phosphatase 3. Glutamyl transpeptidase 4. Glutamyl S transferase 5. Alpha 1 microglobulin 6. Beta 2 microglobulin 7. Kidney injury molecule 8. Osteopontin 9. Clusterin 10. Neutrophil gelatinase-associated lipocalin