N-AC-BETA-ENDORPHIN HUMAN BETA-ENDORPHIN, N-ACETYL- N-Acetyl-beta-endorphin HuMan AC-BETA-ENDORPHIN, HUMAN ACETYL-TYR-GLY-GLY-PHE-MET-THR-SER-GLU-LYS-SER-GLN-THR-PRO-LEU-VAL-THR-LEU-PHE-LYS-ASN-ALA-ILE-ILE-LYS-ASN-ALA-TYR-LYS-LYS-GLY-GLU ACETYL-TYR-GLY-GLY-PHE-MET-THR-SER-GLU-LYS-SER-GLN-THR-PRO-LEU-VAL-THR-LEU-PHE-LYS-ASN-ALA-ILE-ILE-LYS-ASN-ALA-TYR-LYS-LYS-GLY-GLU-OH ACETYL-BETA-ENDORPHIN (HUMAN) AC-TYR-GLY-GLY-PHE-MET-THR-SER-GLU-LYS-SER-GLN-THR-PRO-LEU-VAL-THR-LEU-PHE-LYS-ASN-ALA-ILE-ILE-LYS-ASN-ALA-TYR-LYS-LYS-GLY-GLU-OH