Journal
EUROPEAN JOURNAL OF BIOCHEMISTRY
Volume 268, Issue 7, Pages 1929-1939Publisher
BLACKWELL SCIENCE LTD
DOI: 10.1046/j.1432-1327.2001.02067.x
Keywords
Q-TOF mass spectrometric analysis; MALD-TOF imaging; Locusta migratoria; pars intercerebralis; corpora cardiaca
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The pars intercerebralis-corpora cardiaca system (PI-CC) of insects is the endocrinological equivalent of the hypothalamus-pituitary system of vertebrates. Peptide profiles of the pars intercerebralis and the corpora cardiaca were characterized using simple sampling protocols in combination with MALDI-TOF and electrospray ionization double quadrupole time of flight (ESI-Qq-TOF) mass spectrometric technologies. The results were compared with earlier results of conventional sequencing methods and immunocytochemical methods. In addition to many known peptides, several m/z signals corresponding to putative novel peptides were observed in the corpora cardiaca and/or pars intercerebralis. Furthermore, for a number of peptides evidence was provided about their localization and MALDI-TOF analysis of the released material from the corpora cardiaca yielded information on the hormonal status of particular brain peptides.
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