Analytical Chemistry and Spectroscopy
Wiley InterScience Backfile Collection 1832-2000
Chemistry and Pharmacology
Three basic hexapeptides which have two adjacent arginyl residues were studied by field desorption mass spectrometry. At low emitter temperature singly and doubly charged pseudomolecular ions [M + 1]+ and [M + 2]2+ were observed. At higher temperature, these peptides gave a relatively complex fragmentation pattern which can be explained as resulting from preferential cleavages involving the Arg-Arg sequence. A mechanistic interpretation is proposed for this type of fragmentation.
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