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Howard Zalkin

D-Index & Metrics

Biology and Biochemistry

D-Index
66
Citations
11998
World Ranking
8878
National Ranking
3947

Howard Zalkin 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 Howard Zalkin 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: 181 publications — 42nd percentile

42% of scientists in this discipline score the same or lower.

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

Howard Zalkin 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 Howard Zalkin 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: 66 D-Index — 57th percentile

57% of scientists in this discipline score the same or lower.

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

Overview

Howard Zalkin is affiliated with Purdue University West Lafayette in the United States. Their academic profile reflects engagement primarily through this institution.

Available data does not list specific recent papers, co-authors, publication venues, book publications, fields or subfields of study, or main research topics associated with Howard Zalkin. No awards or honors have been recorded in the accessible information.

Without explicit records of publications or research topics, it is not possible to detail particular areas of expertise or contributions to scientific literature. Similarly, no collaborative networks or frequent co-authors are identified.

Howard Zalkin is currently living, and the provided information does not include details about research impact or citation metrics.

Best Publications

  • Crystal structure of LacI member, PurR, bound to DNA: minor groove binding by alpha helices

    Maria A. Schumacher;Kang Yell Choi;Howard Zalkin;Richard G. Brennan

  • Enzymes Utilizing Glutamine as an Amide Donor

    Howard Zalkin;Janet L. Smith

  • Cloning and characterization of a 12-gene cluster from Bacillus subtilis encoding nine enzymes for de novo purine nucleotide synthesis.

    D J Ebbole;H Zalkin

  • Structure of the allosteric regulatory enzyme of purine biosynthesis

    Janet L. Smith;Eugene J. Zaluzec;Eugene J. Zaluzec;Jean Pierre Wery;Jean Pierre Wery;Liwen Niu;Liwen Niu

  • Coupled Formation of an Amidotransferase Interdomain Ammonia Channel and a Phosphoribosyltransferase Active Site

    Joseph M. Krahn;Jeong Hyun Kim;Mark R. Burns;Ronald J. Parry

  • De novo purine nucleotide biosynthesis.

    Howard Zalkin;Jack E. Dixon

  • Escherichia coli gene purR encoding a repressor protein for purine nucleotide synthesis: cloning, nucleotide sequence, and interaction with the purF operator

    R J Rolfes;H Zalkin

  • A mutation in adenylosuccinate lyase associated with mental retardation and autistic features.

    Randy L. Stone;Junko Aimi;Bruce A. Barshop;Jaak Jaeken

  • The Anthranilate Synthetase-Anthranilate-5-Phosphoribosylpyrophosphate Phosphoribosyltransferase Aggregate ON THE REACTION MECHANISM OF ANTHRANILATE SYNTHETASE FROM SALMONELLA TYPHIMURIUM

    H. Nagano;H. Zalkin;Ellen J. Henderson

  • A cysteine-histidine-aspartate catalytic triad is involved in glutamine amide transfer function in purF-type glutamine amidotransferases.

    Baigen Mei;H. Zalkin

  • Nucleotide sequence of Escherichia coli pyrG encoding CTP synthetase.

    M Weng;C A Makaroff;H Zalkin

  • Identification of the Bacillus subtilis pur operon repressor

    Manli Weng;Peter L. Nagy;Howard Zalkin

  • Crystal structure of glutamine phosphoribosylpyrophosphate amidotransferase from Escherichia coli

    Christine R.A. Muchmore;Joseph M. Krahn;Jeong Hyun Kim;Jeong Hyun Kim;Howard Zalkin

  • Mechanism of corepressor-mediated specific DNA binding by the purine repressor

    Maria A. Schumacher;Kang Yell Choi;Fu Lu;Howard Zalkin

  • Regulated in Vitro Synthesis of Escherichia coli Tryptophan Operon Messenger Ribonucleic Acid and Enzymes

    Howard Zalkin;Charles Yanofsky;Catherine L. Squires

  • Structure and function of the glutamine phosphoribosylpyrophosphate amidotransferase glutamine site and communication with the phosphoribosylpyrophosphate site.

    Jeong Hyun Kim;Joseph M. Krahn;Diana R. Tomchick;Janet L. Smith

  • De novo purine nucleotide biosynthesis: cloning of human and avian cDNAs encoding the trifunctional glycinamide ribonucleotide synthetase-aminoimidazole ribonucleotide synthetase-glycinamide ribonucleotide transformylase by functional complementation in E. coli.

    Junko Aimi;Hong Qiu;John Williams;Howard Zalkin

  • Cloning of the Bacillus subtilis glutamine phosphoribosylpyrophosphate amidotransferase gene in Escherichia coli. Nucleotide sequence determination and properties of the plasmid-encoded enzyme.

    C A Makaroff;H Zalkin;R L Switzer;S J Vollmer

  • Crystal structure of Bacillus subtilis YabJ, a purine regulatory protein and member of the highly conserved YjgF family

    Sangita Sinha;Pekka Rappu;S. C. Lange;Pekka Mäntsälä

  • Binding of cytosolic aconitase to the iron responsive element of porcine mitochondrial aconitase mRNA

    Limin Zheng;Mary Claire Kennedy;George A. Blondin;Helmut Beinert

Frequent Co-Authors

Janet L. Smith
Janet L. Smith University of Michigan–Ann Arbor
Jack E. Dixon
Jack E. Dixon University of California, San Diego
Richard G. Brennan
Richard G. Brennan Duke University
Maria A. Schumacher
Maria A. Schumacher Duke University
Daniel J. Ebbole
Daniel J. Ebbole Texas A&M University
Diana R. Tomchick
Diana R. Tomchick The University of Texas Southwestern Medical Center
Mark A. Hermodson
Mark A. Hermodson Purdue University West Lafayette
Louis Siminovitch
Louis Siminovitch University of Toronto
Jaak Jaeken
Jaak Jaeken KU Leuven
Charles Yanofsky
Charles Yanofsky Stanford University

External Links

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Best Scientists Citing Howard Zalkin

Charles Yanofsky

Charles Yanofsky

Stanford University

Publications: 26

Stephen J. Benkovic

Stephen J. Benkovic

Pennsylvania State University

Publications: 22

Wolfgang Hillen

Wolfgang Hillen

University of Erlangen-Nuremberg

Publications: 18

Janet L. Smith

Janet L. Smith

University of Michigan–Ann Arbor

Publications: 18

Dieter Söll

Dieter Söll

Yale University

Publications: 16

Mikhail S. Gelfand

Mikhail S. Gelfand

Skolkovo Institute of Science and Technology

Publications: 16

Maria A. Schumacher

Maria A. Schumacher

Duke University

Publications: 14

Frank M. Raushel

Frank M. Raushel

Texas A&M University

Publications: 14

Richard G. Brennan

Richard G. Brennan

Duke University

Publications: 14

Ronald R. Breaker

Ronald R. Breaker

Yale University

Publications: 13

Janet M. Thornton

Janet M. Thornton

European Bioinformatics Institute

Publications: 12

Herbert J. Fromm

Herbert J. Fromm

Iowa State University

Publications: 10

Sankar Adhya

Sankar Adhya

National Institutes of Health

Publications: 10

Matthias W. Hentze

Matthias W. Hentze

European Molecular Biology Laboratory

Publications: 9

Lukas C. Kühn

Lukas C. Kühn

École Polytechnique Fédérale de Lausanne

Publications: 9

JoAnne Stubbe

JoAnne Stubbe

MIT

Publications: 9

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