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D-Index & Metrics

Discipline name D-Index World Ranking National Ranking Publications Citations
Genetics 75 1900 871 329 20806

Robert S. Sparkes publications per year

The chart shows the history of publications by Robert S. Sparkes between 1961 and 2012, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Robert S. Sparkes published across 52 years, from 1961 to 2012, averaging 7.6 papers a year. Output peaked at 25 publications in 1989. 1 of the 397 publications appeared in the last two years.

No. of publications
5 10 15 20 25
Bar chart. Horizontal axis: year, 1961 to 2012. Vertical axis: number of publications, 0 to 25. Peak 25 publications in 1989. 1961: 1 publication 1962: 0 publications 1963: 3 publications 1964: 3 publications 1965: 1 publication 1966: 8 publications 1967: 5 publications 1968: 8 publications 1969: 5 publications 1970: 10 publications 1971: 13 publications 1972: 5 publications 1973: 10 publications 1974: 4 publications 1975: 4 publications 1976: 1 publication 1977: 13 publications 1978: 18 publications 1979: 14 publications 1980: 20 publications 1981: 16 publications 1982: 7 publications 1983: 11 publications 1984: 17 publications 1985: 5 publications 1986: 22 publications 1987: 21 publications 1988: 13 publications 1989: 25 publications 1990: 16 publications 1991: 17 publications 1992: 10 publications 1993: 20 publications 1994: 9 publications 1995: 5 publications 1996: 4 publications 1997: 1 publication 1998: 2 publications 1999: 2 publications 2000: 2 publications 2001: 0 publications 2002: 1 publication 2003: 0 publications 2004: 9 publications 2005: 0 publications 2006: 1 publication 2007: 0 publications 2008: 14 publications 2009: 0 publications 2010: 0 publications 2011: 0 publications 2012: 1 publication
1961 2012

397 publications in total across all disciplines

View publications per year as a table
Robert S. Sparkes: publications per year, 1961 to 2012
Year Publications
1961 1
1962 0
1963 3
1964 3
1965 1
1966 8
1967 5
1968 8
1969 5
1970 10
1971 13
1972 5
1973 10
1974 4
1975 4
1976 1
1977 13
1978 18
1979 14
1980 20
1981 16
1982 7
1983 11
1984 17
1985 5
1986 22
1987 21
1988 13
1989 25
1990 16
1991 17
1992 10
1993 20
1994 9
1995 5
1996 4
1997 1
1998 2
1999 2
2000 2
2001 0
2002 1
2003 0
2004 9
2005 0
2006 1
2007 0
2008 14
2009 0
2010 0
2011 0
2012 1
Total 397
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Robert S. Sparkes publications per year - data summary

  • Robert S. Sparkes, a Genetics scholar from University of California, Los Angeles, has 397 publications recorded across 52 years, from 1961 to 2012.
  • The oldest publication on record dates to 1961 and the most recent to 2012.
  • The most productive year is 1989, with 25 publications.
  • The least productive years with any output are 1961, 1965, 1976, 1997 and others, with 1 publication each.
  • 8 of the 52 years in the span carry no publications at all (1962, 2001, 2003, 2005 and others).
  • The rate of publication averages 7.6 papers per year over the whole span, or 9.0 per year counting only the 44 years with at least one publication.
  • The last 5 years on the chart (2008-2012) hold 15 publications, 4% of the career total.
  • Split into equal eras - 1961-1978: 112 publications (6.2 per year); 1979-1996: 252 publications (14.0 per year); 1997-2012: 33 publications (2.1 per year).
  • Comparing the opening and closing eras, the overall trend of publication is declining.

Robert S. Sparkes publication distribution in Genetics in 2026

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

No. of scientists
50 100 150 200
Bar chart with 67 bars. Horizontal axis: publications, 45–54 to 703+. Vertical axis: number of scientists, 0 to 217. Most scientists, 217, have 125–134 publications. The last bar groups every scientist with 703 publications or more. The highlighted bar, 325–334 publications, is where this scientist sits. 45–54 publications: 6 scientists 55–64 publications: 10 scientists 65–74 publications: 35 scientists 75–84 publications: 84 scientists 85–94 publications: 102 scientists 95–104 publications: 151 scientists 105–114 publications: 175 scientists 115–124 publications: 203 scientists 125–134 publications: 217 scientists 135–144 publications: 205 scientists 145–154 publications: 193 scientists 155–164 publications: 188 scientists 165–174 publications: 170 scientists 175–184 publications: 178 scientists 185–194 publications: 164 scientists 195–204 publications: 173 scientists 205–214 publications: 159 scientists 215–224 publications: 134 scientists 225–234 publications: 143 scientists 235–244 publications: 105 scientists 245–254 publications: 114 scientists 255–264 publications: 92 scientists 265–274 publications: 88 scientists 275–284 publications: 87 scientists 285–294 publications: 80 scientists 295–304 publications: 62 scientists 305–314 publications: 75 scientists 315–324 publications: 67 scientists 325–334 publications: 60 scientists 335–344 publications: 52 scientists 345–354 publications: 40 scientists 355–364 publications: 48 scientists 365–374 publications: 47 scientists 375–384 publications: 46 scientists 385–394 publications: 31 scientists 395–404 publications: 27 scientists 405–414 publications: 40 scientists 415–424 publications: 30 scientists 425–434 publications: 43 scientists 435–444 publications: 29 scientists 445–454 publications: 14 scientists 455–464 publications: 28 scientists 465–474 publications: 21 scientists 475–484 publications: 21 scientists 485–494 publications: 22 scientists 495–504 publications: 17 scientists 505–514 publications: 12 scientists 515–524 publications: 11 scientists 525–534 publications: 8 scientists 535–544 publications: 8 scientists 545–554 publications: 14 scientists 555–564 publications: 4 scientists 565–574 publications: 11 scientists 575–584 publications: 5 scientists 585–594 publications: 11 scientists 595–604 publications: 12 scientists 605–614 publications: 7 scientists 615–624 publications: 6 scientists 625–634 publications: 10 scientists 635–644 publications: 9 scientists 645–654 publications: 10 scientists 655–664 publications: 6 scientists 665–674 publications: 6 scientists 675–684 publications: 6 scientists 685–694 publications: 4 scientists 695–702 publications: 6 scientists 703+ publications: 100 scientists
45–54 publications 703+

This scientist: 329 publications — 80th percentile

80% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 703 publications or more.

View publications distribution as a table
Number of Genetics scientists by publication count, Research.com 2026 ranking edition. Based on 4,342 ranked scientists.
Publications Scientists This scientist
45–54 6
55–64 10
65–74 35
75–84 84
85–94 102
95–104 151
105–114 175
115–124 203
125–134 217
135–144 205
145–154 193
155–164 188
165–174 170
175–184 178
185–194 164
195–204 173
205–214 159
215–224 134
225–234 143
235–244 105
245–254 114
255–264 92
265–274 88
275–284 87
285–294 80
295–304 62
305–314 75
315–324 67
325–334 60 329
335–344 52
345–354 40
355–364 48
365–374 47
375–384 46
385–394 31
395–404 27
405–414 40
415–424 30
425–434 43
435–444 29
445–454 14
455–464 28
465–474 21
475–484 21
485–494 22
495–504 17
505–514 12
515–524 11
525–534 8
535–544 8
545–554 14
555–564 4
565–574 11
575–584 5
585–594 11
595–604 12
605–614 7
615–624 6
625–634 10
635–644 9
645–654 10
655–664 6
665–674 6
675–684 6
685–694 4
695–702 6
703+ 100
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Robert S. Sparkes publication distribution in Genetics in 2026 - data summary

  • The chart plots the publication count of all 4,342 Genetics scientists ranked by Research.com in 2026, grouped into 67 ranges running from 45–54 to 703+ publications.
  • Robert S. Sparkes, a Genetics scholar from University of California, Los Angeles, records 329 publications - the 80th percentile of the discipline.
  • 80% of ranked Genetics scientists score the same or lower than Robert S. Sparkes, and about 20% score higher.
  • The median of the discipline falls in the 195–204 publications range, and Robert S. Sparkes ranks above the median.
  • The most crowded range is 125–134 publications, holding 217 scientists (5% of the field).
  • 56% of the field sits in the lowest quarter of the value range (up to 205–214 publications), so the distribution is heavily right-skewed and high scores are rare.
  • The final bar has no upper bound: it groups every scientist with 703 publications or more, 100 scientists in all (2% of the field).

Robert S. Sparkes D-index placement in Genetics in 2026

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

No. of scientists
50 100 150
Bar chart with 61 bars. Horizontal axis: D-Index, 40–41 to 160+. Vertical axis: number of scientists, 0 to 191. Most scientists, 191, have 62–63 D-Index. The last bar groups every scientist with 160 D-Index or more. The highlighted bar, 74–75 D-Index, is where this scientist sits. 40–41 D-Index: 24 scientists 42–43 D-Index: 52 scientists 44–45 D-Index: 84 scientists 46–47 D-Index: 112 scientists 48–49 D-Index: 118 scientists 50–51 D-Index: 141 scientists 52–53 D-Index: 143 scientists 54–55 D-Index: 145 scientists 56–57 D-Index: 179 scientists 58–59 D-Index: 162 scientists 60–61 D-Index: 175 scientists 62–63 D-Index: 191 scientists 64–65 D-Index: 172 scientists 66–67 D-Index: 184 scientists 68–69 D-Index: 164 scientists 70–71 D-Index: 158 scientists 72–73 D-Index: 150 scientists 74–75 D-Index: 136 scientists 76–77 D-Index: 127 scientists 78–79 D-Index: 127 scientists 80–81 D-Index: 111 scientists 82–83 D-Index: 110 scientists 84–85 D-Index: 110 scientists 86–87 D-Index: 84 scientists 88–89 D-Index: 102 scientists 90–91 D-Index: 66 scientists 92–93 D-Index: 72 scientists 94–95 D-Index: 70 scientists 96–97 D-Index: 54 scientists 98–99 D-Index: 60 scientists 100–101 D-Index: 49 scientists 102–103 D-Index: 55 scientists 104–105 D-Index: 45 scientists 106–107 D-Index: 42 scientists 108–109 D-Index: 28 scientists 110–111 D-Index: 39 scientists 112–113 D-Index: 25 scientists 114–115 D-Index: 31 scientists 116–117 D-Index: 29 scientists 118–119 D-Index: 34 scientists 120–121 D-Index: 29 scientists 122–123 D-Index: 29 scientists 124–125 D-Index: 18 scientists 126–127 D-Index: 27 scientists 128–129 D-Index: 22 scientists 130–131 D-Index: 16 scientists 132–133 D-Index: 11 scientists 134–135 D-Index: 17 scientists 136–137 D-Index: 12 scientists 138–139 D-Index: 21 scientists 140–141 D-Index: 4 scientists 142–143 D-Index: 9 scientists 144–145 D-Index: 14 scientists 146–147 D-Index: 6 scientists 148–149 D-Index: 10 scientists 150–151 D-Index: 7 scientists 152–153 D-Index: 9 scientists 154–155 D-Index: 8 scientists 156–157 D-Index: 8 scientists 158–159 D-Index: 9 scientists 160+ D-Index: 96 scientists
40–41 D-Index 160+

This scientist: 75 D-Index — 57th percentile

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

The last bar groups every scientist with 160 D-Index or more.

View D-Index distribution as a table
Number of Genetics scientists by D-index, Research.com 2026 ranking edition. Based on 4,342 ranked scientists.
D-Index Scientists This scientist
40–41 24
42–43 52
44–45 84
46–47 112
48–49 118
50–51 141
52–53 143
54–55 145
56–57 179
58–59 162
60–61 175
62–63 191
64–65 172
66–67 184
68–69 164
70–71 158
72–73 150
74–75 136 75
76–77 127
78–79 127
80–81 111
82–83 110
84–85 110
86–87 84
88–89 102
90–91 66
92–93 72
94–95 70
96–97 54
98–99 60
100–101 49
102–103 55
104–105 45
106–107 42
108–109 28
110–111 39
112–113 25
114–115 31
116–117 29
118–119 34
120–121 29
122–123 29
124–125 18
126–127 27
128–129 22
130–131 16
132–133 11
134–135 17
136–137 12
138–139 21
140–141 4
142–143 9
144–145 14
146–147 6
148–149 10
150–151 7
152–153 9
154–155 8
156–157 8
158–159 9
160+ 96
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Robert S. Sparkes D-index placement in Genetics in 2026 - data summary

  • The chart plots the discipline H-index (D-index) of all 4,342 Genetics scientists ranked by Research.com in 2026, grouped into 61 ranges running from 40–41 to 160+ D-Index.
  • Robert S. Sparkes, a Genetics scholar from University of California, Los Angeles, records 75 D-Index - the 57th percentile of the discipline.
  • 57% of ranked Genetics scientists score the same or lower than Robert S. Sparkes, and about 43% score higher.
  • The median of the discipline falls in the 70–71 D-Index range, and Robert S. Sparkes ranks above the median.
  • The most crowded range is 62–63 D-Index, holding 191 scientists (4% of the field).
  • 51% of the field sits in the lowest quarter of the value range (up to 70–71 D-Index), so the distribution is heavily right-skewed and high scores are rare.
  • The final bar has no upper bound: it groups every scientist with 160 D-Index or more, 96 scientists in all (2% of the field).

Overview

Robert S. Sparkes is affiliated with the University of California, Los Angeles in the United States. Their research focuses primarily within the broad discipline of Biochemistry, Genetics and Molecular Biology, with specific attention to Molecular Biology and Cancer Research.

The scientist's work concentrates on topics relating to Cancer, Hypoxia, and Metabolism; Metabolism, Diabetes, and Cancer; as well as Epigenetics and DNA Methylation. These areas reflect an intersection of cellular metabolism and gene regulation processes relevant to disease states such as cancer.

Robert S. Sparkes has published in the Proceedings of the National Academy of Sciences, among other venues. A notable recent publication by this scientist is:

  • Hypoxia induces a glycolytic complex in intestinal epithelial cells independent of HIF-1-driven glycolytic gene expression (2023), Proceedings of the National Academy of Sciences

This paper highlights topics in hypoxia and metabolism, contributing to an understanding of cellular responses under low oxygen conditions that affect metabolic pathways.

Frequent collaborators in their research include:

  • Sarah J. Kierans
  • Raphael R. Fagundes
  • Mykyta I. Malkov
  • Eugène Dillon
  • Albert Smolenski

These coauthors have frequently contributed to the research outputs alongside Robert S. Sparkes, indicating collaborative efforts particularly in molecular biology and cancer-related studies.

Best Publications

  • Deficient expression of a B cell cytoplasmic tyrosine kinase in human X-linked agammaglobulinemia

    Satoshi Tsukada;Douglas C. Saffran;David J. Rawlings;Ornella Parolini;Ornella Parolini

  • Localization of an ataxia-telangiectasia gene to chromosome 11q22–23

    Richard A. Gatti;Izzet Berkel;Elena Boder;Gary Braedt

  • A mutation in the homeodomain of the human MSX2 gene in a family affected with autosomal dominant craniosynostosis

    Ethylin Wang Jabs;Ulrich Müller;Xiang Li;Liang Ma

  • Regional Assignment of Genes for Human Esterase D and Retinoblastoma to Chromosome Band 13q14

    Robert S. Sparkes;Maryellen C. Sparkes;Miriam G. Wilson;Joseph W. Towner

  • Patient with 13 chromosome deletion: evidence that the retinoblastoma gene is a recessive cancer gene

    William F. Benedict;A. Linn Murphree;Ashutosh Banerjee;Celsa A. Spina

  • D2 and D4 dopamine receptor polymorphisms and personality

    Ernest P. Noble;Tulin Z. Ozkaragoz;Terry L. Ritchie;Xuxian Zhang

  • Hormone-sensitive lipase: sequence, expression, and chromosomal localization to 19 cent-q13.3.

    Cecilia Holm;Todd G. Kirchgessner;Karen L. Svenson;Gudrun Fredrikson

  • Juvenile myoclonic epilepsy (JME) may be linked to the BF and HLA loci on human chromosome 6.

    David A. Greenberg;David A. Greenberg;Antonio V. Delgado-Escueta;Antonio V. Delgado-Escueta;Heidi Widelitz;Robert S. Sparkes

  • An undifferentiated variant derived from the human acute myelogenous leukemia cell line (KG-1)

    HP Koeffler;HP Koeffler;R Billing;R Billing;AJ Lusis;AJ Lusis;R Sparkes;R Sparkes

  • The human and rodent intestinal fatty acid binding protein genes. A comparative analysis of their structure, expression, and linkage relationships.

    D A Sweetser;E H Birkenmeier;I J Klisak;S Zollman

  • Allelic association of the D2 dopamine receptor gene with cocaine dependence

    Ernest P. Noble;Ernest P. Noble;Kenneth Blum;M.Elena Khalsa;M.Elena Khalsa;Terry Ritchie

  • Ataxia-telangiectasia: an interdisciplinary approach to pathogenesis.

    Richard A. Gatti;Elena Boder;Harry V. Vinters;Robert S. Sparkes

  • D2 dopamine receptor gene and cigarette smoking: A reward gene?

    E.P. Noble;S.T.St. Jeor;T. Ritchie;K. Syndulko

  • Human aromatase: cDNA cloning, Southern blot analysis, and assignment of the gene to chromosome 15.

    Shiuan Chen;Marc J. Besman;Robert S. Sparkes;Susan Zollman

  • Assignment of the Human and Mouse Prion Protein Genes to Homologous Chromosomes

    R S Sparkes;M Simon;V H Cohn;R E Fournier

  • Bone marrow origin of hepatic macrophages (Kupffer cells) in humans.

    Robert Peter Gale;Robert S. Sparkes;David W. Golde

  • D2 dopamine receptor gene and obesity

    Ernest P. Noble;Rudolf E. Noble;Terry Ritchie;Karl Syndulko

  • Human monoamine oxidase A and B genes map to Xp 11.23 and are deleted in a patient with Norrie disease.

    Nancy C. Lan;Camilla Heinzmann;Andreas Gal;Ivana Klisak

  • Human genes involved in lipolysis of plasma lipoproteins: Mapping of loci for lipoprotein lipase to 8p22 and hepatic lipase to 15q21

    Robert S. Sparkes;Susan Zollman;Ivana Klisak;Todd G. Kirchgessner

  • Familial retinoblastoma and chromosome 13 deletion transmitted via an insertional translocation

    Louise C. Strong;Vincent M. Riccardi;Robert E. Ferrell;Robert S. Sparkes

Frequent Co-Authors

T. K. Mohandas
T. K. Mohandas Dartmouth College
Aldons J. Lusis
Aldons J. Lusis University of California, Los Angeles
Antonio V. Delgado-Escueta
Antonio V. Delgado-Escueta University of California, Los Angeles
Kenneth K. Kidd
Kenneth K. Kidd Yale University
Mary L. Marazita
Mary L. Marazita University of Pittsburgh
José M. Serratosa
José M. Serratosa Hospital Universitario Fundación Jiménez Díaz
Richard B. Gaynor
Richard B. Gaynor Eli Lilly (United States)
Margarete Mehrabian
Margarete Mehrabian University of California, Los Angeles
Richard A. Gatti
Richard A. Gatti University of California, Los Angeles
David A. Greenberg
David A. Greenberg Nationwide Children's Hospital

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