the distribution and structure of the neurons containing opioid peptide-like immunoreactivity ( enkephalin neurons ) in the antimesenteric border of the guinea pig proximal colon were immunocytochemically investigated using an antiserum for methionine-enkephalin-arg6-gly7-leu8 ( r-0171 ) .
C0014298
enkephalin
C0014295
methionine-enkephalin