Receptors, CalcitriolCalcitriolRetinoid X ReceptorsOsteocalcinReceptors, Retinoic AcidSteroid HydroxylasesCholecalciferolPromoter Regions, GeneticVitamin DOsteosarcomaReceptors, SteroidBase SequenceMolecular Sequence DataTranscription FactorsTranscription, GeneticRegulatory Sequences, Nucleic AcidTranscriptional ActivationDNAGene Expression RegulationBinding SitesTransfectionRNA, MessengerDNA-Binding ProteinsCells, CulturedCell Line