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Cloning and bioinformatics of amphibian mu, delta, kappa, and nociceptin opioid receptors expressed in brain tissue: Evidence for opioid receptor divergence in mammals

Amphibian MuNeuropeptidesHealth SciencesNeurophysiologyNeuroanatomyMedicinePhysiologyMolecular PainNeuropeptide ReceptorNeuropharmacologyNeurosciencePain MechanismNervous SystemPharmacologyOpioid Receptor DivergenceOpioid Use DisorderBrain TissuePain Research