Proteinuria caused by tubule-interstitial renal disease is confirmed by excretion of –
Correct Answer: Light chain
Description: 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
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