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dc.contributor.authorBowie, J.-
dc.contributor.authorSteinborner, S.-
dc.identifier.citationRapid Communications in Mass Spectrometry, 1996; 10(10):1243-1247-
dc.description.abstractThe collision-induced tandem mass spectral data for MH+ and [M-H]- ions from six bio-active peptides from Litoria rubella are compared. Backbone cleavages of [M-H]- ions provide sequencing information for five of the peptides [e.g. Phe Pro Trp Leu (NH2) and pGlu Phe Pro Trp Leu (NH2)] and in these cases, the negative-ion spectra are as informative as the positive-ion spectra. Side-chain cleavages are also noted in these spectra. For example, (i) when Trp is present, the loss of C9H7N (129 u) competes with the backbone cleavages, and (ii) the [M-H]- ion of Ile Glu Phe Phe Thr (NH2) undergoes facile side-chain fragmentation [loss of H2O (from Glu) and MeCHO (from Thr)], but does not form any conventional backbone-cleavage ions.-
dc.publisherJOHN WILEY & SONS LTD-
dc.subjectAmino Acids-
dc.subjectSpectrometry, Mass, Fast Atom Bombardment-
dc.subjectAmino Acid Sequence-
dc.subjectMolecular Sequence Data-
dc.subjectMass Spectrometry-
dc.titleA comparison of the positive and negative ion mass spectra of peptides from the dorsal glandular secretion of the Australian red tree frog, Litoria rubella-
dc.typeJournal article-
Appears in Collections:Aurora harvest 2
Chemistry publications

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