Abstract
Structural characterization of peptides in the range of 500–5000 Da, using fast atom bombardment (FAB) and Cs+ ion liquid secondary ion mass spectrometry (SIMS), is reviewed. These include syntheitc peptides Kemptamide (mol wt 1516); GIF-C15 (mol wt 1875), an isolated natural product as an acylated pentapeptide; and polypeptides generated from enzymatic digests of proteins. MS data is shown to reveal molecular weight and sequence information as well as determine disulfide bonds between cysteine residues and glycosylation sites in the case of a glycopeptide. The complementarity of MS technique to classical biochemical methods for peptide characterization is highlighted. The reader is briefly acquainted with two newer ionization techniques namely, electrospray ionization (ESI) and matrix-assisted laser desorption ionization (MALDI). Synthetic chemists and biochemists can refer to the in-depth review articles that are cited throughout this article.
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Das, P.R., Pramanik, B.N. Fast atom bombardment mass spectrometric characterization of peptides. Mol Biotechnol 9, 141–154 (1998). https://doi.org/10.1007/BF02760815
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DOI: https://doi.org/10.1007/BF02760815