World's Best Scientists 2026 revealed!

D-Index & Metrics

Biology and Biochemistry

D-Index
56
Citations
9185
World Ranking
14633
National Ranking
6126

Valley Stewart 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 Valley Stewart 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: 414 scientists 97–106 publications: 546 scientists 107–116 publications: 704 scientists 117–126 publications: 849 scientists 127–136 publications: 980 scientists 137–146 publications: 942 scientists 147–156 publications: 969 scientists 157–166 publications: 950 scientists 167–176 publications: 951 scientists 177–186 publications: 915 scientists 187–196 publications: 787 scientists 197–206 publications: 841 scientists 207–216 publications: 735 scientists 217–226 publications: 709 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: 418 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: 197 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: 60 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: 101 publications — 5th percentile

5% of scientists in this discipline score the same or lower.

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

Valley Stewart 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 Valley Stewart sits on this spectrum.

40–41 D-Index: 80 scientists 42–43 D-Index: 183 scientists 44–45 D-Index: 317 scientists 46–47 D-Index: 504 scientists 48–49 D-Index: 718 scientists 50–51 D-Index: 900 scientists 52–53 D-Index: 1,026 scientists 54–55 D-Index: 1,150 scientists 56–57 D-Index: 1,236 scientists 58–59 D-Index: 1,253 scientists 60–61 D-Index: 1,163 scientists 62–63 D-Index: 1,131 scientists 64–65 D-Index: 1,032 scientists 66–67 D-Index: 897 scientists 68–69 D-Index: 814 scientists 70–71 D-Index: 715 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: 72 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: 56 D-Index — 28th percentile

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

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

Overview

Valley Stewart is affiliated with the University of California, Davis in the United States. Their research spans several fields, mainly within Agricultural and Biological Sciences and Biochemistry, Genetics and Molecular Biology. Specific subfields of study include Plant Science, Molecular Biology, Radiology, Nuclear Medicine and Imaging, Clinical Biochemistry, and Biotechnology.

Their research focuses on a range of topics related to plant biology and molecular interactions. Key areas of work include:

  • Plant-Microbe Interactions and Immunity
  • Plant Pathogenic Bacteria Studies
  • Legume Nitrogen Fixing Symbiosis
  • Glycosylation and Glycoproteins Research
  • Monoclonal and Polyclonal Antibodies Research
  • Protein Structure and Dynamics
  • Porphyrin Metabolism and Disorders

Stewart's recent publications reflect this focus, with notable papers including:

  • "Plant immunity: Rice XA21-mediated resistance to bacterial infection," 2022, Proceedings of the National Academy of Sciences
  • "Sulfotyrosine residues: Interaction specificity determinants for extracellular protein-protein interactions," 2022, Journal of Biological Chemistry
  • "Purine catabolism by enterobacteria," 2023, Advances in Microbial Physiology
  • "Directed Evolution of a Plant Immune Receptor for Broad Spectrum Effector Recognition," 2024, bioRxiv (Cold Spring Harbor Laboratory)
  • "The HrpX Protein Activates Synthesis of the RaxX Sulfopeptide, Required for Activation of XA21-Mediated Immunity to Xanthomonas oryzae pv. oryzae," 2021, Molecular Plant-Microbe Interactions

The scientist frequently collaborates with other researchers in their field. Notable co-authors include:

  • Pamela C. Ronald
  • Ellen Youngsoo Rim
  • Rashmi Jain
  • Anna Joe
  • María Florencia Ercoli

Stewart's publications commonly appear in several academic venues, reflecting interdisciplinary engagement. Frequent publication venues include:

  • bioRxiv (Cold Spring Harbor Laboratory)
  • Proceedings of the National Academy of Sciences
  • Journal of Biological Chemistry
  • Advances in microbial physiology/Advances in Microbial Physiology
  • Molecular Plant-Microbe Interactions

Best Publications

  • Host-Derived Nitrate Boosts Growth of E. coli in the Inflamed Gut

    Sebastian E. Winter;Maria G. Winter;Mariana N. Xavier;Parameth Thiennimitr;Parameth Thiennimitr

  • Nitrate respiration in relation to facultative metabolism in enterobacteria.

    V Stewart

  • Dual response regulators (NarL and NarP) interact with dual sensors (NarX and NarQ) to control nitrate- and nitrite-regulated gene expression in Escherichia coli K-12.

    R S Rabin;V Stewart

  • Nitrate assimilation by bacteria.

    Janine T. Lin;Valley Stewart

  • Nitric oxide, nitrite, and Fnr regulation of hmp (flavohemoglobin) gene expression in Escherichia coli K-12.

    R. K. Poole;M. F. Anjum;J. Membrillo-Hernandez;Sung Oog Kim

  • Nitrate regulation of anaerobic respiratory gene expression in Escherichia coli

    Valley Stewart

  • Physiological studies of Escherichia coli strain MG1655: growth defects and apparent cross-regulation of gene expression

    Eric Soupene;Wally C. van Heeswijk;Jacqueline Plumbridge;Valley Stewart

  • Identification and expression of genes narL and narX of the nar (nitrate reductase) locus in Escherichia coli K-12.

    V Stewart;J Parales

  • Functional similarities among two-component sensors and methyl-accepting chemotaxis proteins suggest a role for linker region amphipathic helices in transmembrane signal transduction.

    Stanly B. Williams;Valley Stewart

  • Nitrate-inducible formate dehydrogenase in Escherichia coli K-12. I. Nucleotide sequence of the fdnGHI operon and evidence that opal (UGA) encodes selenocysteine.

    B. L. Berg;Jing Li;J. Heider;V. Stewart

  • Beryllofluoride mimics phosphorylation of NtrC and other bacterial response regulators

    Dalai Yan;Ho S. Cho;Curtis A. Hastings;Michele M. Igo

  • Periplasmic Nitrate Reductase (NapABC Enzyme) Supports Anaerobic Respiration by Escherichia coli K-12

    Valley Stewart;Valley Stewart;Yiran Lu;Andrew J. Darwin

  • Structural genes for thiamine biosynthetic enzymes (thiCEFGH) in Escherichia coli K-12.

    P B Vander Horn;A D Backstrom;V Stewart;T P Begley

  • Anaerobic Respiration of Escherichia coli in the Mouse Intestine

    Shari A. Jones;Terri Gibson;Rosalie C. Maltby;Fatema Z. Chowdhury

  • Respiratory Nitrate Ammonification by Shewanella oneidensis MR-1

    Claribel Cruz-García;Alison E. Murray;Joel A. Klappenbach;Valley Stewart

  • Structure of genes narL and narX of the nar (nitrate reductase) locus in Escherichia coli K-12.

    Valley Stewart;J Parales;S M Merkel

  • Conserved mechanism for sensor phosphatase control of two-component signaling revealed in the nitrate sensor NarX

    TuAnh Ngoc Huynh;Chris E. Noriega;Valley Stewart

  • Negative control in two-component signal transduction by transmitter phosphatase activity

    TuAnh Ngoc Huynh;Valley Stewart

  • Differential regulation by the homologous response regulators NarL and NarP of Escherichia coli K‐12 depends on DNA binding site arrangement

    Andrew J. Darwin;Kerry L. Tyson;Stephen J. W. Busby;Valley Stewart

  • Mutational Analysis of a Conserved Signal-Transducing Element: the HAMP Linker of the Escherichia coli Nitrate Sensor NarX

    J. Alex Appleman;Valley Stewart

Frequent Co-Authors

Pamela C. Ronald
Pamela C. Ronald University of California, Davis
Benjamin Schwessinger
Benjamin Schwessinger Australian National University
Tracy Palmer
Tracy Palmer Newcastle University
Ben C. Berks
Ben C. Berks University of Oxford
Sydney Kustu
Sydney Kustu University of California, Berkeley
Christopher J. Petzold
Christopher J. Petzold Lawrence Berkeley National Laboratory
Herman van Tilbeurgh
Herman van Tilbeurgh University of Paris-Saclay
José R. Dinneny
José R. Dinneny Stanford University
Youssef Belkhadir
Youssef Belkhadir Gregor Mendel Institute of Molecular Plant Biology
James M. Tiedje
James M. Tiedje Michigan State University

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