AeropyrumDesulfurococcaceaeCrenarchaeotaArchaeal ProteinsRNA, Transfer, ThrThermoproteaceaeDNA, ArchaealGenome, ArchaealArchaeaGroup II ChaperoninsThreonine-tRNA LigaseRNA, ArchaealEnzyme StabilityProline OxidaseCulture MediaGenes, ArchaealMolecular Sequence DataSubstrate SpecificityTemperatureAmino Acid SequenceHot TemperatureEscherichia coliArchaeal VirusesCrystallography, X-RayCloning, Molecular