Browsing CHEM Faculty Scholarship by Author "Osburn, Sandra M."
Now showing items 1-6 of 6
-
Collision-induced dissociation of protonated tetrapeptides containing beta-alanine, gamma-aminobutyric acid, epsilon-aminocaproic acid or 4-aminomethylbenzoic acid residues
Talaty, Erach R.; Cooper, Travis J.; Osburn, Sandra M.; Van Stipdonk, Michael J. (John Wiley and Sons, 2006-01-01)The influence of the presence and position of a single beta-alanine, gamma-aminobutyric acid, epsilon-aminocaproic acid or 4-aminomethylbenzoic acid residue on the tendency to form b(n)+ -and y(n)+ -type product ions was ... -
Formation of [b3 - 1 + cat]+ ions from metal-cationized tetrapeptides containing beta-alanine, gamma-aminobutyric acid or epsilon-aminocaproic acid residues
Osburn, Sandra M.; Ochola, Sila O.; Talaty, Erach R.; Van Stipdonk, Michael J. (John Wiley and Sons, 2008-11-01)The presence and position of a single beta-alanine (betaA), gamma-aminobutyric acid (gammaABu) or epsilon-aminocaproic acid (Cap) residue has been shown to have a significant influence on the formation of b(n)+ and y(n)+ ... -
Influence of a 4-aminomethylbenzoic acid residue on competitive fragmentation pathways during collision-induced dissociation of metal-cationized peptides
Osburn, Sandra M.; Ochola, Sila O.; Talaty, Erach R.; Van Stipdonk, Michael J. (John Wiley and Sons, 2007-01-01)Formation of [bn+17+cat]+ is a prominent collision-induced dissociation (CID) pathway for Li+- and Na+-cationized peptides. Dissociation of protonated and Ag+-cationized peptides instead favors formation of the rival ... -
Influence of amino acid side chains on apparent selective opening of cyclic b5 ions
Molesworth, Samuel P.; Osburn, Sandra M.; Van Stipdonk, Michael J. (Springer, 2010-06-01)In this study, the possible influence of acidic, basic, and amide side chains on the opening of a putative macrocyclic b ion (b(5)(+)) intermediate was investigated. Collision induced dissociation (CID) of b(5) ions was ... -
Influence of size on apparent scrambling of sequence during CID of b-type ions
Molesworth, Samuel P.; Osburn, Sandra M.; Van Stipdonk, Michael J. (Springer, 2009-11-01)We investigated the influence of peptide size on the apparent loss of sequence during collision-induced dissociation (CID) of b ions using a group of peptides containing from between 4 and 10 residues. Although scrambling ... -
Investigation of the neutral loss of a full amino acid mass during collision-induced dissociation of the b(3)+ ion derived from a model peptide containing a 4-aminobutyric acid residue
Talaty, Erach R.; Chueachavalit, Chawalee; Osburn, Sandra M.; Van Stipdonk, Michael J. (John Wiley and Sons, 2007-01-01)In a previous study we found that a dominant fragmentation pathway observed for collision-induced dissociation (CID) of b(3)+ derived from peptides with sequence AXAG, where X is gamma-aminobutyric acid (gammaAbu) or ...