Lane 1 – MW markers; Lane 2 – ab84002; Lane 3 – ab84002 treated with PNGase F to remove potential N-linked glycans; Lane 4 – ab84002 treated with a glycosidase cocktail to remove potential N and O-linked glycans. Approximately 5 µg of protein was loaded per lane; Gel was stained using Deep Purple™. Drop in MW after treatment with PNGase F indicates presence of N-linked glycans. A further drop in MW after treatment with the glycosidase cocktail indicates the presence of O-linked glycans. Additional bands in lane 3 and lane 4 are glycosidase enzymes.
Post-translational modifications result in protein heterogeneity. The densitometry scan demonstrates the purified human cell expressed protein exists in multiple glycoforms, which differ according to their level of post-translational modification. The triangle indicates theoretical pI and MW of the protein.