Figure 4: (a) Urinary plasmin activity assessed by chromogenic assay and corrected for urinary creatinine concentration. Results are expressed as corrected mean activity ± SE. * versus normal control; † versus IgAN. (b) Representative casein gel zymography results for a plasmin standard and urine supernatants from normal controls, patients with IgAN, and patients with APSGN. Graph shows mean ± SE of the density of 80-kDa bands in casein gel zymography expressed in arbitrary units. * versus normal controls.