We next analyzed the correlation of urinary B7-1 with estimated glomerular filtration rate (eGFR), albumin/urine creatinine ratio (ACR), a marker of glomerular proteinuria, and β-2-microglobulin (β2-MG), a marker of tubular proteinuria, in clinical cohort of patients with glomerular diseases (Supplementary Table S1). Here, ALB is linked to glomerular disorder.