using this model a number of neuropeptide fragments of the proenkephalin a molecule ( peptide f , peptide e , bam 22p , bam 12p , met5-enkephalin-arg6 , phe7 , leu8 , met5-enkephalin-arg6 , phe7 , met-enkephalin , leu-enkephalin ) were tested for in vivo activity .
C0014298
enkephalin
C0014295
met-enkephalin