SERPINA1 and chronic kidney disease: The multiple reaction monitoring quantification method revealed that serum levels of HSP90B2, AAT, IGSF22, CUL5, PKCE, APOA4, APOE, APOA1, CCDC171, CCDC43, VIL1, Antigen KI-67, NKRF, APPBP2, CAPRI, and most complement system proteins were also elevated in CKD patients as compared with a healthy control group [101].