Fig 1.

Concentration of the complement regulatory proteins clusterin and vitronectin bound to circulating immune complexes (CIC) and the fluid phase soluble membrane attack complex (SMAC), measured in systemic lupus erythematosus (SLE) patients. The amount of vitronectin is presented on the left y axis (ng/ml). Clusterin is represented on the right y axis, measured as optical density at 450 nm. The amount of clusterin and vitronectin bound to CIC is two- to threefold higher in every patient, when compared to the vitronectin and clusterin bound to fluid phase SMAC.