AQP2 and chronic kidney disease: Table-1 revealed that the number of protein expression of AQP2 in normal kidney was 5.062±0.4587, while the percentage of protein expression of AQP2 in CKD kidney was 1.218±0.1719, and the percentage of protein expression of AVPR2 in normal kidney was 4.306±0.7695, while the percentage of protein expression of AVPR2 in CKD kidney was 0.8536±0.1396.