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ARS Home » Pacific West Area » Albany, California » Western Regional Research Center » Produce Safety and Microbiology Research » People & Locations » William Zaragoza

William Zaragoza
Produce Safety and Microbiology Research
Microbiologist

Phone: (510) 559-5998
Fax: (510) 559-6162
Room 3106

USDA, ARS, PWA, WRRC-PSM
800 BUCHANAN STREET
ALBANY , CA 94710

Publications (Clicking on the reprint icon Reprint Icon will take you to the publication reprint.)
Top-down and middle-down proteomic analysis of Shiga toxin using MALDI-TOF-TOF mass spectrometry -
Software for top-down proteomic identification of a plasmid-borne factor (and other proteins) from genomically sequenced pathogenic bacteria using MALDI-TOF-TOF-MS/MS and post-source decay -
Fagerquist, C.K., Lee, B.G., Zaragoza, W.J., Yambao, J.C., Quinones, B. 2018. Software for top-down proteomic identification of a plasmid-borne factor (and other proteins) from genomically sequenced pathogenic bacteria using MALDI-TOF-TOF-MS/MS and post-source decay. International Journal of Mass Spectrometry. 438:1-12. https://doi.org/10.1016/j.ijms.2018.12.006.
Clinically-relevant Shiga toxin 2 subtypes from environmental Shiga toxin-producing Escherichia coli identified by top-down/middle-down proteomics and DNA sequencing -
Fagerquist, C.K., Zaragoza, W.J., Lee, B.G., Yambao, J.C., Quinones, B. 2018. Clinically-relevant Shiga toxin 2 subtypes from environmental Shiga toxin-producing Escherichia coli identified by top-down/middle-down proteomics and DNA sequencing. Clinical Mass Spectrometry. 11:27-36. https://doi.org/10.1016/j.clinms.2018.12.001.
Proteolytic surface-shaving and serotype-dependent expression of SPI-1 invasion proteins in Salmonella enterica subspecies enterica -
Fagerquist, C.K., Zaragoza, W.J. 2018. Proteolytic surface-shaving and serotype-dependent expression of SPI-1 invasion proteins in Salmonella enterica subspecies enterica. Frontiers in Nutrition. 5:124. https://doi.org/10.3389/fnut.2018.00124.
Top-down proteomic identification of a novel antibiotic-induced plasmid-encoded factor from Shiga toxin-producing Escherichia coli (STEC) using MALDI-TOF-TOF-MS/MS and post-source decay -
Fagerquist, C.K., Lee, B.G., Zaragoza, W.J., Yambao, J.C., Quinones, B. 2018. Top-down proteomic identification of a novel antibiotic-induced plasmid-encoded factor from Shiga toxin-producing Escherichia coli (STEC) using MALDI-TOF-TOF-MS/MS and post-source decay. Proceedings for 66th Conference on Mass Spectrometry and Allied Topics, June 3-7, 2018, San Diego, California.
Possible mistranslation of Shiga toxin from pathogenic Escherichia coli as measured by MALDI-TOF and Orbitrap mass spectrometry -
Fagerquist, C.K., Zaragoza, W.J. 2018. Possible mistranslation of Shiga toxin from pathogenic Escherichia coli as measured by MALDI-TOF and Orbitrap mass spectrometry. Journal of Analytical & Bioanalytical Techniques. 9(2):1000400. https://doi.org/10.4172/2155-9872.1000400.
Translational errors in expression of Shiga toxin from pathogenic Escherichia coli as measured by MALDI-TOF-TOF and Orbitrap mass spectrometry -
Fagerquist, C.K., Zaragoza, W.J. 2017. Translational errors in expression of Shiga toxin from pathogenic Escherichia coli as measured by MALDI-TOF-TOF and Orbitrap mass spectrometry. Meeting Proceedings. June 4-8, 2017.
Complementary b/y fragment ion pairs from post-source decay of metastable YahO for calibration of MALDI-TOF-TOF-MS/MS -
Fagerquist, C.K., Zaragoza, W.J. 2017. Complementary b/y fragment ion pairs from post-source decay of metastable YahO for calibration of MALDI-TOF-TOF-MS/MS. International Journal of Mass Spectrometry. 415:29-37.
Shiga toxin-producing escherichia coli: detection, differentiation, and implications for food safety -
Zaragoza, W.J., Teplitski, M., Fagerquist, C.K. 2016. Shiga toxin-producing escherichia coli: detection, differentiation, and implications for food safety. Extension Digital Information Source (EDIS). SL440, pages 1-6.
YahO protein as a calibrant for top-down proteomic identification of Shiga toxin using MALDI-TOF-TOF-MS/MS and post-source decay -
Fagerquist, C.K., Zaragoza, W.J. 2016. YahO protein as a calibrant for top-down proteomic identification of Shiga toxin using MALDI-TOF-TOF-MS/MS and post-source decay. Proceedings of the ASMS Conference on Mass Spectrometry and Allied Topics. 280941 MP 719.
A designed experiments approach to optimizing MALDI-TOF MS spectrum processing parameters enhances detection of antibiotic resistance in Campylobacter jejuni -
Christian, P., Grothendick, B., Zhang, L., Borror, C.M., Barbano, D., Cornelius, A.J., Gilpin, B.J., Fagerquist, C.K., Zaragoza, W.J., Lastovica, A.J., Cauchie, H., Sandrin, T.R. 2016. A designed experiments approach to optimizing MALDI-TOF MS spectrum processing parameters enhances detection of antibiotic resistance in Campylobacter jejuni. Frontiers in Microbiology. doi: 10.3389/fmicb.2016.00818.
Bacteriophage cell lysis of Shiga toxin-producing Escherichia coli for top-down proteomic identification of Shiga toxin 1 & 2 using matrix-assisted laser desorption/ionization tandem time-of-light mass spectrometry -
Fagerquist, C.K., Zaragoza, W.J. 2016. Bacteriophage cell lysis of Shiga toxin-producing Escherichia coli for top-down proteomic identification of Shiga toxin 1 & 2 using matrix-assisted laser desorption/ionization tandem time-of-light mass spectrometry. Rapid Communications in Mass Spectrometry. 30(6):671-680.
Enhanced detection and identification of Shiga toxin 1 and 2 from pathogenic bacteria by MALDI-TOF-TOF-MS/MS-PSD and top-down proteomic analysis -
Fagerquist, C.K., Zaragoza, W.J. 2015. Enhanced detection and identification of Shiga toxin 1 and 2 from pathogenic bacteria by MALDI-TOF-TOF-MS/MS-PSD and top-down proteomic analysis. ASMS201525491.3685VER.1.pdf.
Shiga toxin 2 subtypes of enterohemorrhagic E. coli O157:H- E32511 analyzed by RT-qPCR and top-down proteomics using MALDI-TOF-TOF-MS -
Fagerquist, C.K., Zaragoza, W.J. 2015. Shiga toxin 2 subtypes of enterohemorrhagic E. coli O157:H- E32511 analyzed by RT-qPCR and top-down proteomics using MALDI-TOF-TOF-MS. Journal of American Society for Mass Spectrometry. 5(26):788-799.
Two Shiga toxin 2 subtypes in a single Shiga toxin-producing Escherichia coli analyzed by RT-qPCR, MALDI-TOF-TOF-MS and top-down proteomic analysis -
Fagerquist, C.K., Zaragoza, W.J. 2014. Two Shiga toxin 2 subtypes in a single Shiga toxin-producing Escherichia coli analyzed by RT-qPCR, MALDI-TOF-TOF-MS and top-down proteomic analysis. Symposium Proceedings. Proceedings of the 62nd ASMS Conference on Mass Spectrometry and Applied Topics.ASMS201416869.
Top-down proteomic identification of Shiga toxin 2 subtypes from Shiga toxin-producing Escherichia coli by Matrix-Assisted Laser Desorption Ionization-Tandem Time of Flight mass spectrometry -
Fagerquist, C.K., Zaragoza, W.J., Sultan, O., Woo, N., Quinones, B., Cooley, M.B., Mandrell, R.E. 2014. Top-down proteomic identification of Shiga toxin 2 subtypes from Shiga toxin-producing Escherichia coli by Matrix-Assisted Laser Desorption Ionization-Tandem Time of Flight mass spectrometry. Applied and Environmental Microbiology. 8(9):2928-2940.
Top-down proteomic identification of Shiga toxin 2 variants from Shiga toxin-producing Escherichia coli (STEC) using MALDI-TOF-TOF-MS/MS-PSD -
Fagerquist, C.K., Zaragoza, W.J., Sultan, O., Woo, N., Quinones, B., Swimley, M.S., Cooley, M.B., Mandrell, R.E. 2013. Top-down proteomic identification of Shiga toxin 2 variants from Shiga toxin-producing Escherichia coli (STEC) using MALDI-TOF-TOF-MS/MS-PSD. ASMS20139833.3125VER.1.pdf.