Optimization of the experimental procedures in fast atom bombardment mass spectrometry of peptides with a quadrupole mass spectrometer
β Scribed by C. Celma; E. Giralt
- Publisher
- John Wiley and Sons
- Year
- 1990
- Tongue
- English
- Weight
- 412 KB
- Volume
- 19
- Category
- Article
- ISSN
- 1076-5174
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π SIMILAR VOLUMES
In this paper, we have shown that it is possible to differentiate an aspartic acid residue from its p-aspartic acid isomer in dipeptides according to the characteristic fragmentation pathways, i.e. specific immonium ion formation and cleavages involving side-chain atoms.
Oligopeptides subjected to partial enzyme hydrolysis provide mixtures of sub-peptides which optimize amino acid sequence determination by fast atom bombardment mass spectrometry. The digestion mixture can be sampled directly; there is no interference from the enzyme. Complete sequences were obtained