World's Best Scientists 2026 revealed!

D-Index & Metrics

Biology and Biochemistry

D-Index
61
Citations
16777
World Ranking
11195
National Ranking
4844

Paul E. Hardin 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 Paul E. Hardin sits on this spectrum.

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 scientists 997–1,006 publications: 5 scientists 1,007–1,016 publications: 2 scientists 1,017–1,026 publications: 2 scientists 1,027 publications: 1 scientists 1,028+ publications: 100 scientists
47 publications 1,028+

This scientist: 110 publications — 8th percentile

8% of scientists in this discipline score the same or lower.

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

Paul E. Hardin 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 Paul E. Hardin sits on this spectrum.

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 D-Index 167+

This scientist: 61 D-Index — 44th percentile

44% of scientists in this discipline score the same or lower.

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

Overview

Paul E. Hardin is affiliated with Texas A&M University in the United States. Their research primarily focuses on the fields of neuroscience and biochemistry, genetics, and molecular biology, with a strong emphasis on circadian rhythm and melatonin. Other key topics in their work include genetics, aging, and longevity in model organisms, photosynthetic processes and mechanisms, and neurobiology and insect physiology research.

The scientist's work spans several subfields, including endocrine and autonomic systems, aging, molecular biology, cellular and molecular neuroscience, and plant science. Their publication record includes articles in notable scientific journals such as Nature, Current Biology, iScience, Scientific Reports, and Frontiers in Systems Neuroscience.

Recent papers authored or co-authored by Paul E. Hardin cover a range of circadian biology topics:

  • CLOCKWORK ORANGE promotes CLOCK-CYCLE activation via the putative Drosophila ortholog of CLOCK INTERACTING PROTEIN CIRCADIAN (2021, Current Biology)
  • Crosstalk between vrille transcripts, proteins, and regulatory elements controlling circadian rhythms and development in Drosophila (2020, iScience)
  • Proteomic analysis of Drosophila CLOCK complexes identifies rhythmic interactions with SAGA and Tip60 complex component NIPPED-A (2020, Scientific Reports)
  • The P-loop NTPase RUVBL2 is a conserved clock component across eukaryotes (2025, Nature)
  • TRITHORAX-dependent arginine methylation of HSP68 mediates circadian repression by PERIOD in the monarch butterfly (2022, Proceedings of the National Academy of Sciences)

Frequent collaborators include Gustavo Bueno da Silva Rivas, Meimei Liao, Yanqin Liu, Zhancong Xu, and Mingxu Fang. Their repeated collaborations suggest a sustained research partnership in areas related to circadian rhythm and molecular mechanisms underpinning biological clocks.

Their regular contributions to venues such as Nature (2 publications), Current Biology, iScience, Scientific Reports, and Frontiers in Systems Neuroscience underline their active involvement in disseminating research findings within the neuroscience and molecular biology communities.

Best Publications

  • CIRCADIAN RHYTHMS FROM MULTIPLE OSCILLATORS: LESSONS FROM DIVERSE ORGANISMS

    Deborah Bell-Pedersen;Vincent M. Cassone;David J. Earnest;David J. Earnest;Susan S. Golden

  • Feedback of the Drosophila period gene product on circadian cycling of its messenger RNA levels

    Paul E. Hardin;Jeffrey C. Hall;Michael Rosbash;Michael Rosbash

  • vrille, Pdp1, and dClock form a second feedback loop in the Drosophila circadian clock

    Shawn A. Cyran;Anna M. Buchsbaum;Karen L. Reddy;Meng Chi Lin

  • The circadian timekeeping system of Drosophila.

    Paul E. Hardin

  • Interlocked feedback loops within the Drosophila circadian oscillator.

    Nick R. J. Glossop;Lisa C. Lyons;Paul E. Hardin

  • How a circadian clock adapts to seasonal decreases in temperature and day length.

    John Majercak;David Sidote;Paul E. Hardin;Isaac Edery;Isaac Edery

  • Molecular genetic analysis of circadian timekeeping in Drosophila.

    Paul E. Hardin

  • Disruption of the circadian clock within the cardiomyocyte influences myocardial contractile function, metabolism, and gene expression

    Molly S. Bray;Chad A. Shaw;Michael W.S. Moore;Rodrigo A.P. Garcia;Rodrigo A.P. Garcia

  • VRILLE feeds back to control circadian transcription of Clock in the Drosophila circadian oscillator

    Nicholas R.J. Glossop;Jerry H. Houl;Hao Zheng;Fanny S. Ng

  • A promoterless period gene mediates behavioral rhythmicity and cyclical per expression in a restricted subset of the Drosophila nervous system.

    Brigitte Frisch;Paul E. Hardin;Paul E. Hardin;Melanie J. Hamblen-Coyle;Michael Rosbash;Michael Rosbash

  • Circadian rhythms in olfactory responses of Drosophila melanogaster

    Balaji Krishnan;Stuart E. Dryer;Paul E. Hardin

  • A circadian enhancer mediates PER-dependent mRNA cycling in Drosophila melanogaster.

    Haiping Hao;David L. Allen;Paul E. Hardin

  • Circadian oscillations in period gene mRNA levels are transcriptionally regulated.

    Paul E. Hardin;Jeffrey C. Hall;Michael Rosbash

  • PER-dependent rhythms in CLK phosphorylation and E-box binding regulate circadian transcription.

    Wangjie Yu;Hao Zheng;Jerry H. Houl;Brigitte Dauwalder

  • A new role for cryptochrome in a Drosophila circadian oscillator

    Balaji Krishnan;Joel D. Levine;M. Kathlea S. Lynch;Harold B. Dowse

  • Constitutive overexpression of the Drosophila period protein inhibits period mRNA cycling.

    Hongkui Zeng;P. E. Hardin;M. Rosbash

  • Defining the role of Drosophila lateral neurons in the control of circadian rhythms in motor activity and eclosion by targeted genetic ablation and PERIOD protein overexpression.

    Eric Blanchardon;Brigitte Grima;André Klarsfeld;Elisabeth Chélot

  • The intrinsic circadian clock within the cardiomyocyte

    David J. Durgan;Margaret A. Hotze;Tara M. Tomlin;Oluwaseun Egbejimi

  • Circadian clocks in antennal neurons are necessary and sufficient for olfaction rhythms in Drosophila.

    Shintaro Tanoue;Parthasarathy Krishnan;Balaji Krishnan;Stuart E Dryer

  • Circadian timekeeping and output mechanisms in animals

    Paul E Hardin;Satchidananda Panda

Frequent Co-Authors

Michael Rosbash
Michael Rosbash Brandeis University
Jeffrey C. Hall
Jeffrey C. Hall Brandeis University
Stuart E. Dryer
Stuart E. Dryer University of Houston
William H. Klein
William H. Klein The University of Texas MD Anderson Cancer Center
Martin E. Young
Martin E. Young University of Alabama at Birmingham
Chad A. Shaw
Chad A. Shaw Baylor College of Medicine
Robert S. Chapkin
Robert S. Chapkin Texas A&M University
Ian A. Prior
Ian A. Prior University of Liverpool
Steve A. Kay
Steve A. Kay University of Southern California
Laurence J. Zwiebel
Laurence J. Zwiebel Vanderbilt University

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