S. Hunter Walker

Works (9)

Updated: July 6th, 2023 21:17

2015 journal article

Relative Quantification and Higher-Order Modeling of the Plasma Glycan Cancer Burden Ratio in Ovarian Cancer Case-Control Samples

JOURNAL OF PROTEOME RESEARCH, 14(10), 4394–4401.

By: E. Hecht*, E. Scholl*, S. Walker*, A. Taylor, W. Cliby *, A. Motsinger-Reif*, D. Muddiman* 

author keywords: N-linked glycosylation; INLIGHT; ovarian cancer; relative quantification; cancer biomarker; human plasma
MeSH headings : Biomarkers, Tumor / blood; Carbohydrate Sequence; Case-Control Studies; Chromatography, Liquid / methods; Female; Fucose / blood; Glycosylation; Humans; Hydrazines / chemistry; Molecular Sequence Data; Neoplasm Staging; Ovarian Neoplasms / blood; Ovarian Neoplasms / diagnosis; Ovarian Neoplasms / pathology; Polysaccharides / blood; Sialic Acids / blood; Staining and Labeling / methods; Tandem Mass Spectrometry / methods
TL;DR: For all N-glycans, the vectors of the effects from stages II-IV were sequentially reversed, suggesting potential biological changes in OVC morphology or in host response. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
3. Good Health and Well-being (Web of Science; OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2013 journal article

Individuality Normalization when Labeling with Isotopic Glycan Hydrazide Tags (INLIGHT): A Novel Glycan-Relative Quantification Strategy

JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY, 24(9), 1376–1384.

By: S. Walker n, A. Taylor n & D. Muddiman n 

author keywords: Glycomics; Hydrazide Reagents; Stable Isotope Labeling; Normalization; Hydrazone; Formation; Relative Quantification; N-Linked Glycans
MeSH headings : Chromatography, Reverse-Phase; Glycomics / methods; Glycoproteins / chemistry; Glycosylation; Humans; Isotope Labeling / methods; Mass Spectrometry / methods; Plasma / chemistry; Polysaccharides / analysis; Polysaccharides / isolation & purification
TL;DR: The ability to spike in a glycoprotein and detect change at the glycan level validates both the sample preparation and data analysis strategy, making INLIGHT an invaluable relative quantification strategy for the field of glycomics. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2013 journal article

The use of a xylosylated plant glycoprotein as an internal standard accounting for N-linked glycan cleavage and sample preparation variability

Rapid Communications in Mass Spectrometry, 27(12), 1354–1358.

By: S. Walker n, A. Taylor n & D. Muddiman n 

MeSH headings : Analytic Sample Preparation Methods / standards; Glycoproteins / chemistry; Glycosylation; Mass Spectrometry / standards; Plant Proteins / chemistry; Polysaccharides / chemistry; Protein Processing, Post-Translational; Reference Standards
TL;DR: The inclusion of two internal standards, maltoheptaose and horseradish peroxidase (HRP), is studied to demonstrate the effectiveness of using a glycoprotein as an internal standard in glycan relative quantification experiments. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
Sources: NC State University Libraries, NC State University Libraries
Added: August 6, 2018

2012 journal article

Evidence for Complex Molecular Architectures for Solvent-Extracted Lignins

ACS MACRO LETTERS, 1(5), 568–573.

By: S. Harton, S. Pingali, G. Nunnery, D. Baker*, S. Walker n, D. Muddiman n , T. Koga *, T. Rials *, V. Urban, P. Langan

Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2012 journal article

Systematic Comparison of Reverse Phase and Hydrophilic Interaction Liquid Chromatography Platforms for the Analysis of N-Linked Glycans

ANALYTICAL CHEMISTRY, 84(19), 8198–8206.

By: S. Walker n, B. Carlisle n & D. Muddiman n 

MeSH headings : Chromatography, Reverse-Phase; Hydrophobic and Hydrophilic Interactions; Mass Spectrometry; Polysaccharides / analysis
TL;DR: The data presented show that separation of derivatized N-linked glycans by reverse phase chromatography significantly out-performs traditional separation of native or derivatization glycansBy hydrophilic interaction chromatography. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2011 journal article

Hydrophobic Derivatization of N-linked Glycans for Increased Ion Abundance in Electrospray Ionization Mass Spectrometry

JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY, 22(8), 1309–1317.

By: S. Walker n, L. Lilley *, M. Enamorado n, D. Comins n & D. Muddiman n 

author keywords: Hydrophobic Derivatization; HILIC; nanoESI; N-Linked Glycans; Hydrazone Formation
MeSH headings : Blood Proteins / chemistry; Carbohydrate Sequence; Chromatography, Liquid; Glycoproteins / chemistry; Humans; Hydrazines / chemistry; Hydrophobic and Hydrophilic Interactions; Polysaccharides / chemistry; Small Molecule Libraries; Spectrometry, Mass, Electrospray Ionization / methods; Tandem Mass Spectrometry
TL;DR: The results of this study will direct the future synthesis of hydrophobic reagents for glycan analysis using the correlation between hydrophobicity and theoretical non-polar surface area calculation to facilitate the development of an optimum tag for gly can derivatization. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2011 journal article

Spectral Accuracy and Sulfur Counting Capabilities of the LTQ-FT-ICR and the LTQ-Orbitrap XL for Small Molecule Analysis

JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY, 22(12), 2269–2275.

By: S. Blake  n, S. Walker n, D. Muddiman n , D. Hinks n & K. Beck n

author keywords: Electrospray ionization; FT-ICR-MS; Orbitrap-MS; Forensic analysis; Textiles; Trace evidence
MeSH headings : Chi-Square Distribution; Coloring Agents / chemistry; Forensic Sciences; Fourier Analysis; Mass Spectrometry / methods; Polyesters / chemistry; Sensitivity and Specificity; Sulfur / analysis; Textiles / analysis
TL;DR: DY42, a high-volume disperse dye for polyester, was used to compare the capabilities of the LTQ-Orbitrap XL and theLTQ-FT-ICR with respect to mass measurement accuracy (MMA), spectral accuracy, and sulfur counting. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2011 journal article

Stable-Isotope Labeled Hydrophobic Hydrazide Reagents for the Relative Quantification of N-Linked Glycans by Electrospray Ionization Mass Spectrometry

ANALYTICAL CHEMISTRY, 83(17), 6738–6745.

By: S. Walker n, J. Budhathoki-Uprety  n, B. Novak n & D. Muddiman n 

MeSH headings : Carbon Isotopes / chemistry; Glycopeptides / analysis; Glycosylation; Hydrazones / chemistry; Hydrophobic and Hydrophilic Interactions; Isotope Labeling; Polysaccharides / analysis; Spectrometry, Mass, Electrospray Ionization / methods
TL;DR: It is shown that these reagents are capable of quantifying changes in glycosylation in simple mixtures, and the analytical variability of the reagents in pooled plasma samples is shown to be less than ±30%. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2010 article

Interplay of Permanent Charge and Hydrophobicity in the Electrospray Ionization of Glycans

Walker, S. H., Papas, B. N., Comins, D. L., & Muddiman, D. C. (2010, August 1). ANALYTICAL CHEMISTRY, Vol. 82, pp. 6636–6642.

By: S. Walker n, B. Papas n, D. Comins n & D. Muddiman n 

TL;DR: The effectiveness of the incorporation of a permanent charge is studied and determined to hamper glycan analysis and a procedure for glycan hydrazone formation is optimized and outlined where a large number of variables were simultaneously analyzed using a fractional factorial design (FFD). (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

Citation Index includes data from a number of different sources. If you have questions about the sources of data in the Citation Index or need a set of data which is free to re-distribute, please contact us.

Certain data included herein are derived from the Web of Science© and InCites© (2025) of Clarivate Analytics. All rights reserved. You may not copy or re-distribute this material in whole or in part without the prior written consent of Clarivate Analytics.