The present invention features truncated hMCH analogs selectively active
at MCH-1R over MCH-2R. Using amino acid numbering provided in hMCH, the
featured analogs contain an X.sup.6 which is either a D-amino acid,
5-guanidinopropionic acid or its lower or higher homolog, or a derivative
thereof; and a X.sup.10 which is either asparagine, glutamine, alanine,
leucine, isoleucine, valine, norleucine, cyclohexylalanine,
phenylalanine, (2')-naphthylalanine, tyrosine, histidine, tryptophan,
lysine, serine, threonine, methionine, or a derivative thereof.