Western immunoblotting analysis of B4GALNT2 transferase activity in Lacaune sheep granulosa cells and follicular fluids. Granulosa cell protein extracts (50 µg) and follicular fluids (200 µg) from +/+ and L/L large antral follicles were precipitated (P) by agarose-DBA lectin or sepharose-protein A-KM694 monoclonal antibody. The resulting purified glycoproteins were separated on SDS-PAGE, transferred on nitrocellulose membrane and revealed after blotting (B) using biotinylated-DBA lectin or KM694 monoclonal antibody.