This assay has high sensitivity and excellent specificity for detection of 20S-Proteasome. No significant cross-reactivity or interference between 20S-Proteasome and analogues was observed. Sample types: serum, plasma and other biological fluids. Range: 370.37-30000 ng/mL. Sensitivity: 152.4 ng/m. Intra-assay Precision (Precision within an assay): 3 samples with low, middle and high level 20S-Proteasome were tested 20 times on one plate, respectively. Inter-assay Precision (Precision between assays): 3 samples with low, middle and high level 20S-Proteasome were tested on 3 different plates, 8 replicates in each plate.CV (%) = SD/meanX100;Intra-Assay: CV<10%;Inter-Assay: CV<12%. Time: 2 hours