Proteinuria caused by tubule-interstitial renal disease is confirmed by excretion of -
Tubular proteinuria is a result of tubulointersitial disease affecting the proximal renal tubules and interstitium. This results in decreased proximal reabsorption of proteins--in paicular, low molecular weight proteins (generally below 25,000 Daltons) such as beta-2 microglobulin (light chain) are excreted Ref Harrison20th edition pg 295
Albumin
Light chain
Immunoglobulin A
Tamm-Horsfall protein
Kidney