proenkephalin mrna has been detected in striatum , hypothalamus , cortex , cerebellum , hippocampus , midbrain , and brain stem of rat by rna ( `` '' northern '' '' ) blot analysis using a 918-base-pair dna hybridization probe complementary to proenkephalin mrna [ comb , m. , seeburg , p. h. , adelman , j. , eiden , l. & herbert , e. ( 1982 ) nature ( london ) 295 , 663-666 ] .
C0025462
midbrain
C0006121
brain stem