But, attending to the urinary ApoA-I western blot images in their work, the main form of ApoA-I they find in the urine of primary FSGS patients is around 25 kDa [6], a molecular weight compatible with that of the ApoA-Ib form we also find in the urine of FSGS patients [21]. The gene discussed is APOA1; the disease is focal segmental glomerulosclerosis.