ArvicolinaePeriaqueductal GrayMolecular Sequence DataPhylogenyAmino Acid SequenceMultigene FamilySequence Homology, Amino AcidSequence AlignmentEvolution, MolecularBase SequenceBrainMagnetic Resonance ImagingCloning, MolecularDNA, ComplementaryProtein Structure, TertiaryImage Processing, Computer-AssistedSequence Analysis, DNAConserved SequenceAtrophyNerve Fibers, UnmyelinatedSpecies SpecificityPlant ProteinsGray Platelet SyndromeCytochrome P-450 Enzyme System