ISSN:
1052-9306
Keywords:
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The amino acid sequences of the thirteen tryptic peptides of the cowpea strain of tobacco mosaic virus (Cowpea TMV) protein were determined by a combination of the mass spectrometric and Edman degradation procedures. In order to complete the amino acid sequences, a number of the tryptic peptides were further digested with chymotrypsin, thermolysin and carboxypeptidases A and B. The peptide fragments were separated and purified by the use of ion exchange chromatography. Sephadex chromatography and paper electrophoresis.The total number of amino acid residues in the Cowpea TMV protein was found to be 161 as opposed to the 158 found for the type TMV protein, and asparaginyl-arginine was the only tryptic peptide common to both proteins. All peptides used for mass spectrometry were first N-acetylated and then permethylated using methyl iodide and methyl sulphinyl carbanion or potassium t-butoxide dissolved in dimethyl sulphoxide.
Additional Material:
1 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/bms.1200010407
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