Fragmentation of proteins in the 13- to 29-kDa mass range observed by 252Cf-plasma desorption mass spectrometry.
AUTOR(ES)
Bunk, D M
RESUMO
Results are presented on the observation of sequence-specific fragmentation of proteins in the 13- to 29-kDa mass range (ribonuclease A, papain, and proteinase K) by 252Cf-plasma desorption mass spectrometry. For these proteins, extensive N-terminal an, cn + 2, and dn fragment ions are observed with mass accuracies approaching 200 ppm for the most prominent fragment ions. The fragmentation pattern of these proteins shows the same fundamental behavior (arginine-directed, charge-remote fragmentation) that is observed in the fragmentation of small peptides, indicating that similar processes are occurring when large proteins and small peptides fragment in plasma desorption mass spectrometry.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=402153Documentos Relacionados
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