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John S. Klassen

John S. Klassen

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Chemistry 53 13269 11946 361 315 179 8042

John S. Klassen publications per year

The chart shows the history of publications by John S. Klassen between 1973 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. John S. Klassen published across 53 years, from 1973 to 2025, averaging 4.1 papers a year. Output peaked at 14 publications in 2013. 22 of the 215 publications appeared in the last two years.

No. of publications
5 10
Bar chart. Horizontal axis: year, 1973 to 2025. Vertical axis: number of publications, 0 to 14. Peak 14 publications in 2013. 1973: 1 publication 1974: 0 publications 1975: 0 publications 1976: 0 publications 1977: 0 publications 1978: 0 publications 1979: 1 publication 1980: 1 publication 1981: 0 publications 1982: 0 publications 1983: 0 publications 1984: 0 publications 1985: 1 publication 1986: 0 publications 1987: 0 publications 1988: 0 publications 1989: 0 publications 1990: 0 publications 1991: 0 publications 1992: 0 publications 1993: 0 publications 1994: 2 publications 1995: 3 publications 1996: 2 publications 1997: 2 publications 1998: 3 publications 1999: 2 publications 2000: 0 publications 2001: 2 publications 2002: 4 publications 2003: 6 publications 2004: 2 publications 2005: 3 publications 2006: 2 publications 2007: 9 publications 2008: 4 publications 2009: 6 publications 2010: 5 publications 2011: 8 publications 2012: 12 publications 2013: 14 publications 2014: 12 publications 2015: 11 publications 2016: 10 publications 2017: 9 publications 2018: 10 publications 2019: 7 publications 2020: 9 publications 2021: 9 publications 2022: 10 publications 2023: 11 publications 2024: 12 publications 2025: 10 publications
1973 2025

215 publications in total across all disciplines

View publications per year as a table
John S. Klassen: publications per year, 1973 to 2025
Year Publications
1973 1
1974 0
1975 0
1976 0
1977 0
1978 0
1979 1
1980 1
1981 0
1982 0
1983 0
1984 0
1985 1
1986 0
1987 0
1988 0
1989 0
1990 0
1991 0
1992 0
1993 0
1994 2
1995 3
1996 2
1997 2
1998 3
1999 2
2000 0
2001 2
2002 4
2003 6
2004 2
2005 3
2006 2
2007 9
2008 4
2009 6
2010 5
2011 8
2012 12
2013 14
2014 12
2015 11
2016 10
2017 9
2018 10
2019 7
2020 9
2021 9
2022 10
2023 11
2024 12
2025 10
Total 215
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John S. Klassen publication distribution in Chemistry in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Chemistry in 2026. The highlighted bar marks where John S. Klassen sits on this spectrum.

No. of scientists
250 500 750 1,000 1,250
Bar chart with 63 bars. Horizontal axis: publications, 61–80 to 1,295+. Vertical axis: number of scientists, 0 to 1,350. Most scientists, 1,350, have 161–180 publications. The last bar groups every scientist with 1,295 publications or more. The highlighted bar, 161–180 publications, is where this scientist sits. 61–80 publications: 66 scientists 81–100 publications: 302 scientists 101–120 publications: 623 scientists 121–140 publications: 918 scientists 141–160 publications: 1,218 scientists 161–180 publications: 1,350 scientists 181–200 publications: 1,344 scientists 201–220 publications: 1,281 scientists 221–240 publications: 1,216 scientists 241–260 publications: 1,100 scientists 261–280 publications: 979 scientists 281–300 publications: 939 scientists 301–320 publications: 764 scientists 321–340 publications: 643 scientists 341–360 publications: 628 scientists 361–380 publications: 522 scientists 381–400 publications: 459 scientists 401–420 publications: 397 scientists 421–440 publications: 327 scientists 441–460 publications: 270 scientists 461–480 publications: 265 scientists 481–500 publications: 252 scientists 501–520 publications: 201 scientists 521–540 publications: 185 scientists 541–560 publications: 148 scientists 561–580 publications: 148 scientists 581–600 publications: 132 scientists 601–620 publications: 114 scientists 621–640 publications: 104 scientists 641–660 publications: 91 scientists 661–680 publications: 92 scientists 681–700 publications: 73 scientists 701–720 publications: 57 scientists 721–740 publications: 54 scientists 741–760 publications: 67 scientists 761–780 publications: 45 scientists 781–800 publications: 46 scientists 801–820 publications: 39 scientists 821–840 publications: 32 scientists 841–860 publications: 36 scientists 861–880 publications: 29 scientists 881–900 publications: 26 scientists 901–920 publications: 24 scientists 921–940 publications: 14 scientists 941–960 publications: 23 scientists 961–980 publications: 28 scientists 981–1,000 publications: 15 scientists 1,001–1,020 publications: 29 scientists 1,021–1,040 publications: 12 scientists 1,041–1,060 publications: 19 scientists 1,061–1,080 publications: 12 scientists 1,081–1,100 publications: 6 scientists 1,101–1,120 publications: 8 scientists 1,121–1,140 publications: 12 scientists 1,141–1,160 publications: 5 scientists 1,161–1,180 publications: 6 scientists 1,181–1,200 publications: 14 scientists 1,201–1,220 publications: 7 scientists 1,221–1,240 publications: 2 scientists 1,241–1,260 publications: 6 scientists 1,261–1,280 publications: 4 scientists 1,281–1,294 publications: 6 scientists 1,295+ publications: 100 scientists
61–80 publications 1,295+

This scientist: 179 publications — 25th percentile

25% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,295 publications or more.

View publications distribution as a table
Number of Chemistry scientists by publication count, Research.com 2026 ranking edition. Based on 17,934 ranked scientists.
Publications Scientists This scientist
61–80 66
81–100 302
101–120 623
121–140 918
141–160 1,218
161–180 1,350 179
181–200 1,344
201–220 1,281
221–240 1,216
241–260 1,100
261–280 979
281–300 939
301–320 764
321–340 643
341–360 628
361–380 522
381–400 459
401–420 397
421–440 327
441–460 270
461–480 265
481–500 252
501–520 201
521–540 185
541–560 148
561–580 148
581–600 132
601–620 114
621–640 104
641–660 91
661–680 92
681–700 73
701–720 57
721–740 54
741–760 67
761–780 45
781–800 46
801–820 39
821–840 32
841–860 36
861–880 29
881–900 26
901–920 24
921–940 14
941–960 23
961–980 28
981–1,000 15
1,001–1,020 29
1,021–1,040 12
1,041–1,060 19
1,061–1,080 12
1,081–1,100 6
1,101–1,120 8
1,121–1,140 12
1,141–1,160 5
1,161–1,180 6
1,181–1,200 14
1,201–1,220 7
1,221–1,240 2
1,241–1,260 6
1,261–1,280 4
1,281–1,294 6
1,295+ 100
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John S. Klassen D-index placement in Chemistry in 2026

The chart shows the D-index (discipline H-index) distribution of Chemistry scientists ranked by Research.com in 2026. The highlighted bar marks where John S. Klassen sits on this spectrum.

No. of scientists
250 500 750 1,000
Bar chart with 61 bars. Horizontal axis: D-Index, 40–41 to 159+. Vertical axis: number of scientists, 0 to 1,051. Most scientists, 1,051, have 56–57 D-Index. The last bar groups every scientist with 159 D-Index or more. The highlighted bar, 52–53 D-Index, is where this scientist sits. 40–41 D-Index: 289 scientists 42–43 D-Index: 612 scientists 44–45 D-Index: 808 scientists 46–47 D-Index: 776 scientists 48–49 D-Index: 835 scientists 50–51 D-Index: 861 scientists 52–53 D-Index: 872 scientists 54–55 D-Index: 933 scientists 56–57 D-Index: 1,051 scientists 58–59 D-Index: 930 scientists 60–61 D-Index: 882 scientists 62–63 D-Index: 834 scientists 64–65 D-Index: 731 scientists 66–67 D-Index: 775 scientists 68–69 D-Index: 683 scientists 70–71 D-Index: 646 scientists 72–73 D-Index: 561 scientists 74–75 D-Index: 501 scientists 76–77 D-Index: 437 scientists 78–79 D-Index: 388 scientists 80–81 D-Index: 354 scientists 82–83 D-Index: 292 scientists 84–85 D-Index: 275 scientists 86–87 D-Index: 254 scientists 88–89 D-Index: 235 scientists 90–91 D-Index: 185 scientists 92–93 D-Index: 192 scientists 94–95 D-Index: 155 scientists 96–97 D-Index: 163 scientists 98–99 D-Index: 125 scientists 100–101 D-Index: 105 scientists 102–103 D-Index: 105 scientists 104–105 D-Index: 112 scientists 106–107 D-Index: 88 scientists 108–109 D-Index: 68 scientists 110–111 D-Index: 69 scientists 112–113 D-Index: 65 scientists 114–115 D-Index: 79 scientists 116–117 D-Index: 61 scientists 118–119 D-Index: 44 scientists 120–121 D-Index: 37 scientists 122–123 D-Index: 40 scientists 124–125 D-Index: 33 scientists 126–127 D-Index: 26 scientists 128–129 D-Index: 34 scientists 130–131 D-Index: 35 scientists 132–133 D-Index: 25 scientists 134–135 D-Index: 27 scientists 136–137 D-Index: 17 scientists 138–139 D-Index: 16 scientists 140–141 D-Index: 20 scientists 142–143 D-Index: 20 scientists 144–145 D-Index: 15 scientists 146–147 D-Index: 9 scientists 148–149 D-Index: 9 scientists 150–151 D-Index: 16 scientists 152–153 D-Index: 11 scientists 154–155 D-Index: 9 scientists 156–157 D-Index: 3 scientists 158 D-Index: 3 scientists 159+ D-Index: 98 scientists
40–41 D-Index 159+

This scientist: 53 D-Index — 28th percentile

28% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 159 D-Index or more.

View D-Index distribution as a table
Number of Chemistry scientists by D-index, Research.com 2026 ranking edition. Based on 17,934 ranked scientists.
D-Index Scientists This scientist
40–41 289
42–43 612
44–45 808
46–47 776
48–49 835
50–51 861
52–53 872 53
54–55 933
56–57 1,051
58–59 930
60–61 882
62–63 834
64–65 731
66–67 775
68–69 683
70–71 646
72–73 561
74–75 501
76–77 437
78–79 388
80–81 354
82–83 292
84–85 275
86–87 254
88–89 235
90–91 185
92–93 192
94–95 155
96–97 163
98–99 125
100–101 105
102–103 105
104–105 112
106–107 88
108–109 68
110–111 69
112–113 65
114–115 79
116–117 61
118–119 44
120–121 37
122–123 40
124–125 33
126–127 26
128–129 34
130–131 35
132–133 25
134–135 27
136–137 17
138–139 16
140–141 20
142–143 20
144–145 15
146–147 9
148–149 9
150–151 16
152–153 11
154–155 9
156–157 3
158 3
159+ 98
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Overview

John S. Klassen is affiliated with the University of Alberta in Canada. Their research mainly spans the fields of Biochemistry, Genetics and Molecular Biology, with a significant focus on Molecular Biology and Medicine.

Klassen's recent publications cover a range of topics related to glycobiology, viral entry mechanisms, and protein interactions. Selected recent papers include:

  • Sialic acid-containing glycolipids mediate binding and viral entry of SARS-CoV-2, 2021, Nature Chemical Biology
  • A versatile soluble siglec scaffold for sensitive and quantitative detection of glycan ligands, 2020, Nature Communications
  • Carbohydrate Sulfation As a Mechanism for Fine-Tuning Siglec Ligands, 2021, ACS Chemical Biology
  • Structural and biochemical characterization of the exopolysaccharide deacetylase Agd3 required for Aspergillus fumigatus biofilm formation, 2020, Nature Communications
  • Submicron Emitters Enable Reliable Quantification of Weak Protein-Glycan Interactions by ESI-MS, 2021, Analytical Chemistry

Their research topics reflect a strong emphasis on:

  • Glycosylation and Glycoproteins Research
  • Carbohydrate Chemistry and Synthesis
  • SARS-CoV-2 and COVID-19 Research
  • Monoclonal and Polyclonal Antibodies Research
  • Mass Spectrometry Techniques and Applications
  • Bacterial biofilms and quorum sensing
  • Enzyme Structure and Function

Klassen frequently collaborates with several other researchers, among them:

  • Elena N. Kitova (33 publications)
  • Duong T. Bui (22 publications)
  • Matthew S. Macauley (19 publications)
  • Lara K. Mahal (17 publications)
  • Ling Han (15 publications)

Publication venues where Klassen's work predominantly appears include:

  • Analytical Chemistry (10 publications)
  • Nature Communications (7 publications)
  • bioRxiv (Cold Spring Harbor Laboratory) (7 publications)
  • ACS Chemical Biology (3 publications)
  • Journal of the American Chemical Society (3 publications)

The scientist's subfields of study are diverse and include:

  • Molecular Biology
  • Infectious Diseases
  • Organic Chemistry
  • Spectroscopy
  • Radiology, Nuclear Medicine and Imaging

Best Publications

  • Reliable Determinations of Protein–Ligand Interactions by Direct ESI-MS Measurements. Are We There Yet?

    Elena N. Kitova;Amr El-Hawiet;Paul D. Schnier;John S. Klassen

  • Sialic acid-containing glycolipids mediate binding and viral entry of SARS-CoV-2.

    Linh Nguyen;Kelli A McCord;Duong T Bui;Kim M Bouwman

  • Method for distinguishing specific from nonspecific protein-ligand complexes in nanoelectrospray ionization mass spectrometry.

    Jiangxiao Sun;Elena N Kitova;Weijie Wang;John S Klassen

  • Influence of Solution and Gas Phase Processes on Protein−Carbohydrate Binding Affinities Determined by Nanoelectrospray Fourier Transform Ion Cyclotron Resonance Mass Spectrometry

    Weijie Wang;Elena N. Kitova;John S. Klassen

  • The Peptidisc, a simple method for stabilizing membrane proteins in detergent-free solution.

    Michael Luke Carlson;John William Young;Zhiyu Zhao;Lucien Fabre

  • Thermal decomposition of a gaseous multiprotein complex studied by blackbody infrared radiative dissociation. Investigating the origin of the asymmetric dissociation behavior.

    Natalia Felitsyn;Elena N. Kitova;John S. Klassen

  • Activation energies for dissociation of double strand oligonucleotide anions: evidence for watson-crick base pairing in vacuo.

    Paul D. Schnier;John S. Klassen;Eric F. Strittmatter;Evan R. Williams

  • Optogenetic control with a photocleavable protein, PhoCl

    Wei Zhang;Alexander W Lohman;Yevgeniya Zhuravlova;Xiaocen Lu

  • Functional Characterization of Bacterial Oligosaccharyltransferases Involved in O-Linked Protein Glycosylation

    Amirreza Faridmoayer;Messele A. Fentabil;Dominic C. Mills;John S. Klassen

  • Reaction Enthalpies for M+L = M+ + L, Where M+ = Na+ and K+ and L = Acetamide, N-Methylacetamide, N,N-Dimethylacetamide, Glycine, and Glycylglycine, from Determinations of the Collision-Induced Dissociation Thresholds

    John S. Klassen;Stephen G. Anderson;and Arthur T. Blades;Paul Kebarle

  • Collision-Induced Dissociation Threshold Energies of Protonated Glycine, Glycinamide, and Some Related Small Peptides and Peptide Amino Amides

    John S. Klassen;Paul Kebarle

  • Method for stabilizing protein-ligand complexes in nanoelectrospray ionization mass spectrometry.

    Jiangxiao Sun;Elena N. Kitova;John S. Klassen

  • Hydrophobic protein-ligand interactions preserved in the gas phase.

    Lan Liu;Dhanashri Bagal;Elena N. Kitova;Paul D. Schnier

  • DETERMINATIONS OF ION-MOLECULE EQUILIBRIA INVOLVING IONS PRODUCED BY ELECTROSPRAY. HYDRATION OF PROTONATED AMINES, DIAMINES, AND SOME SMALL PEPTIDES

    John S. Klassen;Arthur T. Blades;Paul Kebarle

  • Hydration of Gas-Phase Gramicidin S (M + 2H)2+ Ions Formed by Electrospray: The Transition From Solution to Gas-Phase Structure

    Sandra E. Rodriguez-Cruz;John S. Klassen;Evan R. Williams

  • Nonspecific protein-carbohydrate complexes produced by nanoelectrospray ionization. Factors influencing their formation and stability.

    Weijie Wang;Elena N. Kitova;John S. Klassen

  • Droplet Electrospray Mass Spectrometry

    Darcy B. Hager;Norman J. Dovichi;John. Klassen;Paul. Kebarle

  • Ligand specificity of CS-35, a monoclonal antibody that recognizes mycobacterial lipoarabinomannan: a model system for oligofuranoside-protein recognition.

    Christoph Rademacher;Glen K. Shoemaker;Hyo-Sun Kim;Ruixiang Blake Zheng

  • FREE ENERGIES OF HYDRATION IN THE GAS PHASE OF THE ANIONS OF SOME OXO ACIDS OF C, N, S, P, CL, AND I

    Arthur T. Blades;John S. Klassen;Paul Kebarle

  • Determination of protein-ligand association thermochemistry using variable-temperature nanoelectrospray mass spectrometry.

    Rambod Daneshfar;Elena N Kitova;John S Klassen

  • Trapping and characterization of covalent intermediates of mutant retaining glycosyltransferases

    Naoto Soya;Ying Fang;Monica M Palcic;John S Klassen

Frequent Co-Authors

Xi Jiang
Xi Jiang Cincinnati Children's Hospital Medical Center
Ming Tan
Ming Tan Cincinnati Children's Hospital Medical Center
Todd L. Lowary
Todd L. Lowary University of Alberta
Gilbert G. Privé
Gilbert G. Privé University of Toronto
David R. Bundle
David R. Bundle University of Alberta
Paul Kebarle
Paul Kebarle University of Alberta
Evan R. Williams
Evan R. Williams University of California, Berkeley
Monica M. Palcic
Monica M. Palcic Carlsberg Laboratory
P. Lynne Howell
P. Lynne Howell University of Toronto
Jeroen D. C. Codée
Jeroen D. C. Codée Leiden University

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