Receptor, PAR-1Receptors, ThrombinReceptor, PAR-2Receptors, Proteinase-ActivatedPars PlanitisSubstantia NigraGene Expression RegulationReverse Transcriptase Polymerase Chain ReactionVitrectomyThrombinTranscription, GeneticCells, CulturedCell PolarityAmino Acid SequenceProtein BiosynthesisBlotting, NorthernMolecular Sequence DataCell LineBase SequenceOligopeptidesSignal TransductionRNA StabilityPoly Adenosine Diphosphate Ribose