CKD Biomarker panel Proteomics is the analysis of large number of proteins or polypeptides in tissue and body fluids. Capillary electrophoresis mass spectrometry (CE-MS) enables reproducible and robust high-resolution analysis of several thousand low-molecular-weight urinary proteins/peptides in about one hour. Urine holds several advantages over blood in clinical proteomics. It can be collected non-invasively and its proteome is relatively stable. Members of the consortium have successfully identified a urinary biomarker pattern including 273 peptides significantly associated with chronic kidney disease (CKD273).