at 24 h following thermal lesion and at a time when the lesioned paw was still used for walking there was a reduction in met- and leu-enkephalin content in the periaqueductal grey ( pag ) and bilateral reduction in leu-enkephalin content of the globus pallidus , but no change in enkephalin levels in caudate-putamen .
C0014294
leu-enkephalin
C0014298
enkephalin