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- W1997504039 abstract "This paper describes the optimization of sample preparation for MALDI 193-nm photofragment ion time-of-flight mass spectrometry to sequence small to medium-sized peptides from peptide mixtures. We show that matrix additives, such as fructose and phenylbutyric acid have a dramatic effect on the abundance of fragment ions observed in the post-source decay spectra. A dried-droplet MALDI matrix consisting of 1:1 alpha-cyano-4-hydroxycinnamic acid/fructose proves to be an excellent matrix for photodissociation because [M + H]+ ions are formed with low internal energies, and the photofragment ion spectrum contains high abundances of sequence-informative ions. The addition of fructose appears to improve overall sample homogeneity and durability, as compared to conventional alpha-cyano-4-hydroxycinnamic acid dried-droplet preparations. MALDI-TOF photodissociation is then used to selectively sequence the peptides bradykinin (RPPGFSPFR), des-Arg9 bradykinin (RPPGFSPF), and substance P-amide (RPKPQQFFGLM-NH2) from a mixture of five peptides." @default.
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- W1997504039 date "2001-10-13" @default.
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- W1997504039 title "Optimization of Sample Preparation for Peptide Sequencing by MALDI-TOF Photofragment Mass Spectrometry" @default.
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- W1997504039 doi "https://doi.org/10.1021/ac0102157" @default.
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