Receptors, GlycineGlycineReflex, AbnormalMuscle HypertoniaStiff-Person SyndromeReceptors, N-Methyl-D-AspartateStartle ReactionMuscle RigidityGlycine Plasma Membrane Transport ProteinsStrychnineNervous System DiseasesGenetic Diseases, X-LinkedBrain StemRNA Splice SitesGlycine AgentsMutationPedigreeMolecular Sequence DataGlycine Dehydrogenase (Decarboxylating)Amino Acid SequenceGlycine N-MethyltransferaseGlycine Decarboxylase Complex H-ProteinBetaineGlycine Decarboxylase ComplexSoybeansGlycine HydroxymethyltransferaseSarcosineAmino Acid Transport Systems, Neutral