JOSEPH C G ET AL: 'Chimeric NDP-MSH and MTII melanocortin peptides with agouti-related protein (AGRP) Arg-Phe-Phe amino acids possess agonist melanocortin receptor activity', PEPTIDES, ELSEVIER, AMSTERDAM, NL, vol. 24, no. 12, 1 December 2003 (2003-12-01), pages 1899 - 1908, XP002312500, ISSN: 0196-9781, DOI: 10.1016/J.PEPTIDES.2003.10.005