Blood Coagulation FactorsProtein CThrombomodulinReceptors, Cell SurfaceFactor VIIaReceptor, PAR-1Endothelium, VascularUmbilical VeinsReceptor, Serotonin, 5-HT2CThrombinAntigens, CDEndothelial CellsCells, CulturedProtein C DeficiencyProtein C InhibitorProtein SMolecular Sequence DataBlood CoagulationSerotonin 5-HT2 Receptor AntagonistsAmino Acid SequenceSerotonin 5-HT2 Receptor AgonistsAnticoagulantsGlycoproteinsActivated Protein C ResistanceEndotheliumSepsisHuman Umbilical Vein Endothelial CellsCytoprotection