Untersuchung von isomeren Tripeptiden und Derivaten des Thyrotropin-,Releasing" Hormons durch Elektronenstoß- und Felddesorptions-Massenspektrometrie / Investigation of Isomeric Tripeptides and Thyrotropin-Releasing Hormone Derivatives by Electron Impact and Field Desorption Mass Spectrometry

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Abstract
The complementary informations from field desorption and electron impact mass spectra of free tripeptides and thyrotropine releasing hormone derivatives can be used to determine primary structure and molecular weight. Characteristic and diagnostic fragmentation pathways, the formation of diketopiperazines and the temperature-dependent tendency to form amine fragments and diketopiperazines will be discussed.