World's Best Scientists 2026 revealed!

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Chemistry 102 1194 1059 466 380 415 30472
Biology and Biochemistry 107 1117 994 668 582 471 35313

Donald A. Bryant publications per year

The chart shows the history of publications by Donald A. Bryant between 1975 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Donald A. Bryant published across 51 years, from 1975 to 2025, averaging 9.9 papers a year. Output peaked at 27 publications in 2011. 9 of the 503 publications appeared in the last two years.

No. of publications
5 10 15 20 25
Bar chart. Horizontal axis: year, 1975 to 2025. Vertical axis: number of publications, 0 to 27. Peak 27 publications in 2011. 1975: 1 publication 1976: 2 publications 1977: 2 publications 1978: 1 publication 1979: 1 publication 1980: 0 publications 1981: 5 publications 1982: 3 publications 1983: 0 publications 1984: 1 publication 1985: 5 publications 1986: 2 publications 1987: 11 publications 1988: 6 publications 1989: 4 publications 1990: 10 publications 1991: 6 publications 1992: 15 publications 1993: 7 publications 1994: 4 publications 1995: 14 publications 1996: 10 publications 1997: 12 publications 1998: 11 publications 1999: 7 publications 2000: 4 publications 2001: 7 publications 2002: 15 publications 2003: 6 publications 2004: 8 publications 2005: 6 publications 2006: 15 publications 2007: 15 publications 2008: 20 publications 2009: 10 publications 2010: 19 publications 2011: 27 publications 2012: 19 publications 2013: 15 publications 2014: 19 publications 2015: 19 publications 2016: 21 publications 2017: 20 publications 2018: 15 publications 2019: 12 publications 2020: 15 publications 2021: 15 publications 2022: 16 publications 2023: 16 publications 2024: 6 publications 2025: 3 publications
1975 2025

503 publications in total across all disciplines

View publications per year as a table
Donald A. Bryant: publications per year, 1975 to 2025
Year Publications
1975 1
1976 2
1977 2
1978 1
1979 1
1980 0
1981 5
1982 3
1983 0
1984 1
1985 5
1986 2
1987 11
1988 6
1989 4
1990 10
1991 6
1992 15
1993 7
1994 4
1995 14
1996 10
1997 12
1998 11
1999 7
2000 4
2001 7
2002 15
2003 6
2004 8
2005 6
2006 15
2007 15
2008 20
2009 10
2010 19
2011 27
2012 19
2013 15
2014 19
2015 19
2016 21
2017 20
2018 15
2019 12
2020 15
2021 15
2022 16
2023 16
2024 6
2025 3
Total 503
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Donald A. Bryant publication distribution in Biology and Biochemistry in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Biology and Biochemistry in 2026. The highlighted bar marks where Donald A. Bryant sits on this spectrum.

No. of scientists
200 400 600 800
Bar chart with 100 bars. Horizontal axis: publications, 47–56 to 1,028+. Vertical axis: number of scientists, 0 to 980. Most scientists, 980, have 127–136 publications. The last bar groups every scientist with 1,028 publications or more. The highlighted bar, 467–476 publications, is where this scientist sits. 47–56 publications: 8 scientists 57–66 publications: 35 scientists 67–76 publications: 106 scientists 77–86 publications: 231 scientists 87–96 publications: 413 scientists 97–106 publications: 546 scientists 107–116 publications: 704 scientists 117–126 publications: 848 scientists 127–136 publications: 980 scientists 137–146 publications: 942 scientists 147–156 publications: 969 scientists 157–166 publications: 949 scientists 167–176 publications: 951 scientists 177–186 publications: 915 scientists 187–196 publications: 787 scientists 197–206 publications: 840 scientists 207–216 publications: 733 scientists 217–226 publications: 708 scientists 227–236 publications: 651 scientists 237–246 publications: 605 scientists 247–256 publications: 510 scientists 257–266 publications: 524 scientists 267–276 publications: 434 scientists 277–286 publications: 417 scientists 287–296 publications: 350 scientists 297–306 publications: 363 scientists 307–316 publications: 315 scientists 317–326 publications: 296 scientists 327–336 publications: 261 scientists 337–346 publications: 240 scientists 347–356 publications: 219 scientists 357–366 publications: 196 scientists 367–376 publications: 154 scientists 377–386 publications: 161 scientists 387–396 publications: 155 scientists 397–406 publications: 145 scientists 407–416 publications: 124 scientists 417–426 publications: 112 scientists 427–436 publications: 132 scientists 437–446 publications: 116 scientists 447–456 publications: 99 scientists 457–466 publications: 81 scientists 467–476 publications: 91 scientists 477–486 publications: 80 scientists 487–496 publications: 80 scientists 497–506 publications: 59 scientists 507–516 publications: 36 scientists 517–526 publications: 46 scientists 527–536 publications: 54 scientists 537–546 publications: 44 scientists 547–556 publications: 43 scientists 557–566 publications: 43 scientists 567–576 publications: 42 scientists 577–586 publications: 25 scientists 587–596 publications: 34 scientists 597–606 publications: 23 scientists 607–616 publications: 33 scientists 617–626 publications: 31 scientists 627–636 publications: 27 scientists 637–646 publications: 25 scientists 647–656 publications: 28 scientists 657–666 publications: 34 scientists 667–676 publications: 18 scientists 677–686 publications: 16 scientists 687–696 publications: 10 scientists 697–706 publications: 12 scientists 707–716 publications: 21 scientists 717–726 publications: 12 scientists 727–736 publications: 12 scientists 737–746 publications: 10 scientists 747–756 publications: 7 scientists 757–766 publications: 13 scientists 767–776 publications: 15 scientists 777–786 publications: 13 scientists 787–796 publications: 9 scientists 797–806 publications: 9 scientists 807–816 publications: 7 scientists 817–826 publications: 4 scientists 827–836 publications: 9 scientists 837–846 publications: 7 scientists 847–856 publications: 3 scientists 857–866 publications: 5 scientists 867–876 publications: 5 scientists 877–886 publications: 11 scientists 887–896 publications: 3 scientists 897–906 publications: 4 scientists 907–916 publications: 7 scientists 917–926 publications: 5 scientists 927–936 publications: 6 scientists 937–946 publications: 6 scientists 947–956 publications: 3 scientists 957–966 publications: 7 scientists 967–976 publications: 2 scientists 977–986 publications: 2 scientists 987–996 publications: 1 scientist 997–1,006 publications: 5 scientists 1,007–1,016 publications: 2 scientists 1,017–1,026 publications: 2 scientists 1,027 publications: 1 scientist 1,028+ publications: 100 scientists
47–56 publications 1,028+

This scientist: 471 publications — 94th percentile

94% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,028 publications or more.

View publications distribution as a table
Number of Biology and Biochemistry scientists by publication count, Research.com 2026 ranking edition. Based on 19,587 ranked scientists.
Publications Scientists This scientist
47–56 8
57–66 35
67–76 106
77–86 231
87–96 413
97–106 546
107–116 704
117–126 848
127–136 980
137–146 942
147–156 969
157–166 949
167–176 951
177–186 915
187–196 787
197–206 840
207–216 733
217–226 708
227–236 651
237–246 605
247–256 510
257–266 524
267–276 434
277–286 417
287–296 350
297–306 363
307–316 315
317–326 296
327–336 261
337–346 240
347–356 219
357–366 196
367–376 154
377–386 161
387–396 155
397–406 145
407–416 124
417–426 112
427–436 132
437–446 116
447–456 99
457–466 81
467–476 91 471
477–486 80
487–496 80
497–506 59
507–516 36
517–526 46
527–536 54
537–546 44
547–556 43
557–566 43
567–576 42
577–586 25
587–596 34
597–606 23
607–616 33
617–626 31
627–636 27
637–646 25
647–656 28
657–666 34
667–676 18
677–686 16
687–696 10
697–706 12
707–716 21
717–726 12
727–736 12
737–746 10
747–756 7
757–766 13
767–776 15
777–786 13
787–796 9
797–806 9
807–816 7
817–826 4
827–836 9
837–846 7
847–856 3
857–866 5
867–876 5
877–886 11
887–896 3
897–906 4
907–916 7
917–926 5
927–936 6
937–946 6
947–956 3
957–966 7
967–976 2
977–986 2
987–996 1
997–1,006 5
1,007–1,016 2
1,017–1,026 2
1,027 1
1,028+ 100
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Donald A. Bryant D-index placement in Biology and Biochemistry in 2026

The chart shows the D-index (discipline H-index) distribution of Biology and Biochemistry scientists ranked by Research.com in 2026. The highlighted bar marks where Donald A. Bryant sits on this spectrum.

No. of scientists
250 500 750 1,000 1,250
Bar chart with 65 bars. Horizontal axis: D-Index, 40–41 to 167+. Vertical axis: number of scientists, 0 to 1,253. Most scientists, 1,253, have 58–59 D-Index. The last bar groups every scientist with 167 D-Index or more. The highlighted bar, 106–107 D-Index, is where this scientist sits. 40–41 D-Index: 80 scientists 42–43 D-Index: 183 scientists 44–45 D-Index: 316 scientists 46–47 D-Index: 504 scientists 48–49 D-Index: 718 scientists 50–51 D-Index: 899 scientists 52–53 D-Index: 1,025 scientists 54–55 D-Index: 1,149 scientists 56–57 D-Index: 1,235 scientists 58–59 D-Index: 1,253 scientists 60–61 D-Index: 1,162 scientists 62–63 D-Index: 1,130 scientists 64–65 D-Index: 1,031 scientists 66–67 D-Index: 897 scientists 68–69 D-Index: 814 scientists 70–71 D-Index: 714 scientists 72–73 D-Index: 709 scientists 74–75 D-Index: 596 scientists 76–77 D-Index: 512 scientists 78–79 D-Index: 473 scientists 80–81 D-Index: 412 scientists 82–83 D-Index: 373 scientists 84–85 D-Index: 358 scientists 86–87 D-Index: 285 scientists 88–89 D-Index: 273 scientists 90–91 D-Index: 227 scientists 92–93 D-Index: 208 scientists 94–95 D-Index: 193 scientists 96–97 D-Index: 153 scientists 98–99 D-Index: 157 scientists 100–101 D-Index: 148 scientists 102–103 D-Index: 120 scientists 104–105 D-Index: 113 scientists 106–107 D-Index: 100 scientists 108–109 D-Index: 86 scientists 110–111 D-Index: 67 scientists 112–113 D-Index: 71 scientists 114–115 D-Index: 73 scientists 116–117 D-Index: 64 scientists 118–119 D-Index: 53 scientists 120–121 D-Index: 60 scientists 122–123 D-Index: 54 scientists 124–125 D-Index: 43 scientists 126–127 D-Index: 38 scientists 128–129 D-Index: 49 scientists 130–131 D-Index: 26 scientists 132–133 D-Index: 18 scientists 134–135 D-Index: 23 scientists 136–137 D-Index: 32 scientists 138–139 D-Index: 32 scientists 140–141 D-Index: 27 scientists 142–143 D-Index: 19 scientists 144–145 D-Index: 22 scientists 146–147 D-Index: 12 scientists 148–149 D-Index: 16 scientists 150–151 D-Index: 14 scientists 152–153 D-Index: 10 scientists 154–155 D-Index: 13 scientists 156–157 D-Index: 10 scientists 158–159 D-Index: 7 scientists 160–161 D-Index: 9 scientists 162–163 D-Index: 13 scientists 164–165 D-Index: 4 scientists 166 D-Index: 4 scientists 167+ D-Index: 98 scientists
40–41 D-Index 167+

This scientist: 107 D-Index — 95th percentile

95% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 167 D-Index or more.

View D-Index distribution as a table
Number of Biology and Biochemistry scientists by D-index, Research.com 2026 ranking edition. Based on 19,587 ranked scientists.
D-Index Scientists This scientist
40–41 80
42–43 183
44–45 316
46–47 504
48–49 718
50–51 899
52–53 1,025
54–55 1,149
56–57 1,235
58–59 1,253
60–61 1,162
62–63 1,130
64–65 1,031
66–67 897
68–69 814
70–71 714
72–73 709
74–75 596
76–77 512
78–79 473
80–81 412
82–83 373
84–85 358
86–87 285
88–89 273
90–91 227
92–93 208
94–95 193
96–97 153
98–99 157
100–101 148
102–103 120
104–105 113
106–107 100 107
108–109 86
110–111 67
112–113 71
114–115 73
116–117 64
118–119 53
120–121 60
122–123 54
124–125 43
126–127 38
128–129 49
130–131 26
132–133 18
134–135 23
136–137 32
138–139 32
140–141 27
142–143 19
144–145 22
146–147 12
148–149 16
150–151 14
152–153 10
154–155 13
156–157 10
158–159 7
160–161 9
162–163 13
164–165 4
166 4
167+ 98
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Research.com Recognitions

  • 2018 - ASM D.C. White Award, American Society for Microbiology
  • 2010 - Fellow of the American Association for the Advancement of Science (AAAS)

Overview

Donald A. Bryant is affiliated with Pennsylvania State University in the United States. Their research primarily spans the field of Biochemistry, Genetics and Molecular Biology, with a significant focus on Molecular Biology, Ecology, Cellular and Molecular Neuroscience, Renewable Energy, Sustainability and the Environment, and Plant Science.

Their scientific contributions have centered on several key topics, including:

  • Photosynthetic Processes and Mechanisms
  • Photoreceptor and optogenetics research
  • Algal biology and biofuel production
  • Bacteriophages and microbial interactions
  • Spectroscopy and Quantum Chemical Studies
  • Biocrusts and Microbial Ecology
  • Microbial Community Ecology and Physiology

Donald A. Bryant has published extensively, with frequent appearances in venues such as the Journal of Biological Chemistry, Photosynthesis Research, bioRxiv (Cold Spring Harbor Laboratory), Zenodo (CERN European Organization for Nuclear Research), and Biochimica et Biophysica Acta (BBA) - Bioenergetics.

Some of the recent papers authored or co-authored by Donald A. Bryant include:

  • "A genomic catalog of Earth's microbiomes," 2020, Nature Biotechnology
  • "Expansion of the global RNA virome reveals diverse clades of bacteriophages," 2022, Cell
  • "Biosynthesis of the modified tetrapyrroles-the pigments of life," 2020, Journal of Biological Chemistry
  • "Unraveling the functional dark matter through global metagenomics," 2023, Nature
  • "The structure of Photosystem I acclimated to far-red light illuminates an ecologically important acclimation process in photosynthesis," 2020, Science Advances

Frequent co-authors collaborating with Donald A. Bryant include:

  • Lila M. Gierasch
  • F. Peter Guengerich
  • Ruma Banerjee
  • Roger Colbran
  • Peter Cresswell

The scientist has been recognized by professional associations, having received the ASM D.C. White Award from the American Society for Microbiology in 2018 and was named a Fellow of the American Association for the Advancement of Science (AAAS) in 2010.

Best Publications

  • The Molecular Biology of Cyanobacteria

    Donald A. Bryant

  • A genomic catalog of Earth’s microbiomes

    Stephen Nayfach;Simon Roux;Rekha Seshadri;Daniel Udwary

  • Prokaryotic photosynthesis and phototrophy illuminated

    Donald A. Bryant;Niels Ulrik Frigaard

  • Unexpected diversity and complexity of the Guerrero Negro hypersaline microbial mat.

    Ruth E. Ley;J. Kirk Harris;Joshua Wilcox;John R. Spear

  • Candidatus Chloracidobacterium thermophilum: an aerobic phototrophic Acidobacterium.

    Donald A. Bryant;Amaya M. Garcia Costas;Julia A. Maresca;Aline Gomez Maqueo Chew

  • The structure of cyanobacterial phycobilisomes: a model

    Donald A. Bryant;Gérard Guglielmi;Nicole Tandeau de Marsac;Anne Marie Castets

  • Extensive remodeling of a cyanobacterial photosynthetic apparatus in far-red light

    Fei Gan;Shuyi Zhang;Nathan C. Rockwell;Shelley S. Martin

  • The tricarboxylic acid cycle in cyanobacteria.

    Shuyi Zhang;Donald Ashley Bryant;Donald Ashley Bryant

  • The complete genome sequence of Chlorobium tepidum TLS, a photosynthetic, anaerobic, green-sulfur bacterium.

    Jonathan A. Eisen;Karen E. Nelson;Ian T. Paulsen;John F. Heidelberg

  • Expansion of the global RNA virome reveals diverse clades of bacteriophages

    Unknown

  • Alternating syn-anti bacteriochlorophylls form concentric helical nanotubes in chlorosomes

    Swapna Ganapathy;Gert T. Oostergetel;Piotr K. Wawrzyniak;Michael Reus

  • Type IV pilus biogenesis and motility in the cyanobacterium Synechocystis sp. PCC6803.

    Devaki Bhaya;Nicole R. Bianco;Donald Bryant;Arthur Grossman

  • Chlorophyll biosynthesis in bacteria: the origins of structural and functional diversity.

    Aline Gomez Maqueo Chew;Donald Ashley Bryant

  • Phycoerythrocyanin and Phycoerythrin: Properties and Occurrence in Cyanobacteria

    Donald A. Bryant

  • Biosynthesis of the modified tetrapyrroles—the pigments of life

    Donald A. Bryant;Donald A. Bryant;C. Neil Hunter;Martin J. Warren;Martin J. Warren

  • Highly Divergent Methyltransferases Catalyze a Conserved Reaction in Tocopherol and Plastoquinone Synthesis in Cyanobacteria and Photosynthetic Eukaryotes

    Zigang Cheng;Scott Sattler;Hiroshi Maeda;Yumiko Sakuragi

  • Characterization and structural properties of the major biliproteins of Anabaena sp.

    Donald A. Bryant;Alexander N. Glazer;Frederick A. Eiserling

  • Mechanisms and Evolution of Oxidative Sulfur Metabolism in Green Sulfur Bacteria

    Lea Haarup Gregersen;Donald A Bryant;Niels-Ulrik Frigaard

  • Synechococcus sp. Strain PCC 7002 Transcriptome: Acclimation to Temperature, Salinity, Oxidative Stress, and Mixotrophic Growth Conditions.

    Marcus Ludwig;Donald A. Bryant

  • Nucleotide sequence of the cyanelle genome from Cyanophora paradoxa

    Veronica L. Stirewalt;Christine B. Michalowski;Wolfgang Löffelhardt;Hans J. Bohnert

  • Recruitment of a Foreign Quinone into the A1 Site of Photosystem I I. GENETIC AND PHYSIOLOGICAL CHARACTERIZATION OF PHYLLOQUINONE BIOSYNTHETIC PATHWAY MUTANTS IN SYNECHOCYSTIS SP. PCC 6803

    T. Wade Johnson;Gaozhong Shen;Boris Zybailov;Derrick Kolling

  • PsaD is required for the stable binding of PsaC to the photosystem I core protein of Synechococcus sp. PCC 6301.

    Ning Li;Jindong Zhao;Patrick V. Warren;Joseph T. Warden

Frequent Co-Authors

John H. Golbeck
John H. Golbeck Pennsylvania State University
Gaozhong Shen
Gaozhong Shen Pennsylvania State University
David M. Ward
David M. Ward Montana State University
Stephan C. Schuster
Stephan C. Schuster Nanyang Technological University
Michael Kühl
Michael Kühl University of Copenhagen
G. Charles Dismukes
G. Charles Dismukes Rutgers, The State University of New Jersey
Eric S. Boyd
Eric S. Boyd Montana State University
C. Neil Hunter
C. Neil Hunter University of Sheffield
Alexander N. Glazer
Alexander N. Glazer University of California, Berkeley
James K. Fredrickson
James K. Fredrickson Pacific Northwest National Laboratory

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