The podocin short isoform is N-glycosylated. A) PNGase-F treatment removes the double band from the short isoform in DRM fraction 7. Lysates from Figure 3 were subjected to treatment with PNGase-F and immunoblotted and detected with anti-V5 antibody. B) N to S mutation of the N-glycosylation consensus motif completely abrogates the formation of a double band. The asparagine at position 287 corresponds to amino acid 355 in the full-length protein. HEK293T cells were transfected with V5-tagged Podocin (short isoform or short isoform N287S, respectively) and lysates were immunoblotted and detected with anti-V5 antibody.