Browsing Chemistry and Biochemistry by Author "Talaty, Erach R."
Now showing items 1-15 of 15
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3S-fluoroproline as a probe to monitor proline isomerization during protein folding by 19F-NMR
Thomas, Colin A.; Talaty, Erach R.; Bann, James G. (Royal Society of Chemistry, 2009-06-21)Variable-temperature inversion transfer NMR is used to determine the kinetic and thermodynamic parameters of cis-trans isomerization of N-Ac-(3R) and (3S)-fluoroproline-OMe. -
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 ... -
Conversion of methanol to formaldehyde following CID of gas-phase zinc complex ion
Cooper, Travis J.; Talaty, Erach R.; Chien, Wen-Fang Winnie; Pham, G.; Anbalagan, Victor; Van Stipdonk, Michael J. (Wichita State University. Graduate School., 2005-04-22) -
Determination of regioselectivity in ring opening of tert-butylaziridinones by a combination of (15)N labeling and electrospray ionization-ion trap mass spectrometry
Talaty, Erach R.; Van Stipdonk, Michael J.; Hague, M. J.; Provenzano, F. A.; Boese, C. A. (John Wiley and Sons, 2002-01-01)The ring opening of 1,3-di-tert-butylaziridinone by tert-butylamine and aniline was investigated by using electrospray ionization and collision-induced dissociation in an ion trap mass spectrometer in conjunction with (15)N ... -
Formation of [b(n) + 17 + Ag]+ product ions from Ag+ cationized native and acetylated peptides
Anbalagan, Victor; Perera, B. A.; Silva, A. T. M.; Gallardo, A. L.; Barber, M.; Barr, J. M.; Terkarli, S. M.; Talaty, Erach R.; Van Stipdonk, Michael J. (John Wiley and Sons, 2002-09-01)We compared the tandem mass spectra of a range of native and acetylated Ag(+) cationized peptides to determine the influence of the derivatization step on the abundance of the [b(n) + 17 + Ag](+) product ions. Using ... -
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)+ ... -
Gas phase attachment of water and methanol to Ag(I) complexes with alpha-amino acids in an ion trap mass spectrometer
Perera, B. A.; Ince, M. P.; Talaty, Erach R.; Van Stipdonk, Michael J. (John Wiley and Sons, 2001-01-01)Electrospray ionization was used to generate gas phase complexes of Ag+ with selected alpha-amino acids. Following storage (isolation without collisional activation) in an ion trap mass spectrometer, the mass spectra ... -
Influence of "alternative" C-terminal amino acids on the formation of [b3 + 17 + Cat]+ products from metal cationized synthetic tetrapeptides
Anbalagan, Victor; Silva, A. T. M.; Rajagopalachary, S; Bulleigh, Kellis; Talaty, Erach R.; Van Stipdonk, Michael J. (John Wiley and Sons, 2004-05-01)The aim of this study was to investigate the dissociation patterns, and in particular the relative abundance of [b(3) + 17 + Cat](+), for peptides with C-termini designed to allow transfer of the -OH required to generate ... -
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 a ring substituent on the tendency to form H(2)O adducts to Ag(+) complexes with phenylalanine analogues in an ion trap mass spectrometer
Perera, B. A.; Gallardo, A. L.; Barr, J. M.; Tekarli, S. M.; Anbalagan, Victor; Talaty, Erach R.; Van Stipdonk, Michael J. (John Wiley and Sons, 2002-04-01)In a previous report we showed that certain binary Ag(+)-amino acid complexes formed adduct ions by the attachment of a single water and methanol molecule when stored in an ion trap mass spectrometer: complexes with aliphatic ... -
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 ... -
Isotope labeling and theoretical study of the formation of a3* ions from protonated tetraglycine
Cooper, Travis J.; Talaty, Erach R.; Grove, Jerod; Van Stipdonk, Michael J.; Suhai, Sándor; Paizs, Béla (Springer, 2006-12-01)Extensive 13C, 15N, and 2H labeling of tetraglycine was used to investigate the b3+ --> a3* reaction during low-energy collision-induced dissociation (CID) in a quadrupole ion-trap mass spectrometer. The patterns observed ... -
Novel fragmentation pathway for CID of (b(n) - 1 + Cat)+ ions from model, metal cationized peptides
Cooper, Travis J.; Talaty, Erach R.; Van Stipdonk, Michael J. (Springer, 2005-08-01)We report a new fragmentation pathway for the CID of (b3 - 1 + Cat)+ product ions derived from the model peptide AXAG, where X = beta-alanine, gamma-aminobutyric acid, epsilon-amino-n-caproic acid, or 4-aminomethylbenzoic ... -
A study of fragmentation of protonated amides of some acylated amino acids by tandem mass spectrometry: observation of an unusual nitrilium ion
Talaty, Erach R.; Young, Sarah M.; Dain, Ryan P.; Van Stipdonk, Michael J. (John Wiley and Sons, 2011-05-15)A tandem mass spectrometric study of a series of secondary amides of acetylglycine and hippuric acid utilizing electrospray ionization (ESI) was conducted. Among the fragment ions observed was an unusual one, which we have ... -
A study of the elimination of water from lithium-cationized tripeptide methyl esters by means of tandem mass spectrometry and isotope labeling
Talaty, Erach R.; Cooper, Travis J.; Piland, Debra L.; Bateman, David J.; Syed, Adeel; Stevenson, William T.K.; Van Stipdonk, Michael J. (John Wiley and Sons, 2006-01-01)Extensive isotope labeling (2H, 13C and 15N), collision-induced dissociation (CID) and multiple-stage tandem mass spectrometry were used to investigate the elimination of H2O from a series of model, metal-cationized ...