Mass Spectrometric Studies of Some Synaptosomal and Synthetic Peptides

Kirsi-Marja Marnela Department of Biomedical Sciences, University of Tampere, Box 607, SF-33101, Tampere, Finland

Erik A. Hagen Department of Pharmacy, University of Olso, Box 1068, Blindern, Oslo 3, Norway

Arne J. Aasen Department of Pharmacy, University of Olso, Box 1068, Blindern, Oslo 3, Norway

Thrina Loennechen Department of Chemistry, University of Tromsø, Box 953, 9001, Tromsø, Norway

Leiv K. Sydnes Department of Chemistry, University of Tromsø, Box 953, 9001, Tromsø, Norway

Maritta Timonen Department of Biochemistry, University of Oulu, SF-90570, Oulu, Finland

Pekka Lähdesmäki Department of Biochemistry, University of Oulu, SF-90570, Oulu, Finland

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Abstract

Mass spectra were recorded using direct inlet and electron impact ionization from two synthetic peptides, N-acetyl-aspartyl-4-aminobutyric acid and γ-glutamyl-taurine and a natural peptide, N-acetylaspartyl-glycyl-alanyl-aspartyl-serine, isolated from calf brain synaptosomes. The peptides were studied either underivatized or first acetylated with acetic acid anhydride and then permethylated with methyl iodide. The synthetic peptides were used to check the completeness of the derivatization reactions.

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Mass Spectrometric Studies of Some Synaptosomal and Synthetic Peptides

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Mass Spectrometric Studies of Some Synaptosomal and Synthetic Peptides

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