high concentrations of le ( between 500 and 750 fmol/mg protein ) were found in 15 brain areas , among them the periventricular nucleus , medial preoptic area , suprachiasmatic nucleus , dorsal premamillary nucleus , ventromedial nucleus , arcuate nucleus , nucleus ambiguus , locus coeruleus , substantia nigra .
C0086045
concentrations
C0006104
brain