Regulation of lineage-specific gene expression by Notch signal proteins in primary LECs. Western blot analyses showing the expression of vascular markers for lymphatic (VEGFR-3, podoplanin, LYVE-1), venous (EphB4, NP-2), and arterial (ephrinB2) endothelial cells in primary LECs that were transduced with a control (AdCTR), NICD (AdNICD), Hey1 (AdHey1), Hey2 (AdHey2), or Hes1 (AdHes1)–expressing adenovirus for 48 hours.