Figure 2. Comparison of urinary light chains between stable SLE and active SLE.

(A) Immunofixation electrophoresis patterns of patient’s urine. The levels of U-kappa (B, D) and U-lambda (C, E) among different SLE disease activity groups. ROC curves analysis of U-kappa (F) and U-lambda (G) to distinguish active SLE from stable SLE. PATIENT1, active SLE; PATIENT2, stable SLE; PATIENT3, healthy controls.