... (LPXRFamide pep-tides) may be a conserved property of vertebrate brains, in particular the hypothalamus. In view of the immunohisto-chemical finding indicating that some of FMRFamide-likeimmunoreactive ... determined by a tandemmass spectrometric analysis (Fig. 3). Assignment of theobserved typical fragment ions, i.e. N-terminal (b) and C-terminal (y) ions, indicated that the amino acid sequence of ... Iwakoshi3, Hiroyuki Minakata3 and Kazuyoshi Tsutsui1,21Laboratory of Brain Science, Faculty of Integrated Arts and Sciences, Hiroshima University, Higashi-Hiroshima, Japan,2Core Research of Evolutional...