Immunoblots were performed as described (6 (link)). Membranes were probed with the indicated primary antibodies, anti-LPL and anti-phosphoLPL (provided by Eric J. Brown, Genentech) (20 (link), 21 (link)), and actin (D6A8) as loading control (Cell Signaling, Danvers, MA). Goat anti-rabbit-AlexaFluor680 (Invitrogen) and goat anti-mouse-IRDye800 (Rockland Immunochemicals, Gilbertsville, PA) antibodies were used to detect membrane-bound antibodies. Signal was visualized using LiCOR Odyssey imaging system and software (LiCOR, Lincoln, NE).