<prompt> Cystatin C is used for ?Diagnosis of acute renal failureTransplant survivalSepsisPancreatitis  <response>: Refer to question no 242explanation is given there Cystatin C or cystatin 3, a protein encoded by the CST3 gene, is mainly used as a biomarker of kidney function. Recently, it has been studied for its role in predicting new-onset or deteriorating cardiovascular disease. It also seems to play a role in brain disorders involving amyloid, such as Alzheimers disease. Ref Harrison20th edition pg 287 