Penelope N. Markham

1.3k total citations
20 papers, 977 citations indexed

About

Penelope N. Markham is a scholar working on Oncology, Molecular Biology and Molecular Medicine. According to data from OpenAlex, Penelope N. Markham has authored 20 papers receiving a total of 977 indexed citations (citations by other indexed papers that have themselves been cited), including 11 papers in Oncology, 9 papers in Molecular Biology and 7 papers in Molecular Medicine. Recurrent topics in Penelope N. Markham's work include Drug Transport and Resistance Mechanisms (11 papers), Antibiotic Resistance in Bacteria (7 papers) and Immune Cell Function and Interaction (5 papers). Penelope N. Markham is often cited by papers focused on Drug Transport and Resistance Mechanisms (11 papers), Antibiotic Resistance in Bacteria (7 papers) and Immune Cell Function and Interaction (5 papers). Penelope N. Markham collaborates with scholars based in United States, Czechia and Israel. Penelope N. Markham's co-authors include Alexander A. Neyfakh, Nora Vázquez‐Laslop, Alex A. Neyfakh, Michael E. Johnson, Maqbool Ahmed, Howard M. Gebel, Anita S. Chong, John S. Coon, Steven D. Bines and Ekaterina E. Zheleznova and has published in prestigious journals such as Journal of Biological Chemistry, Biochemistry and Trends in Biochemical Sciences.

In The Last Decade

Penelope N. Markham

19 papers receiving 942 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Penelope N. Markham United States 15 461 367 356 185 169 20 977
Steve Grkovic Australia 11 686 1.5× 487 1.3× 208 0.6× 161 0.9× 404 2.4× 15 1.3k
Gillian Ross United Kingdom 16 635 1.4× 784 2.1× 220 0.6× 338 1.8× 341 2.0× 30 1.6k
Colette Goffin Belgium 14 706 1.5× 299 0.8× 207 0.6× 101 0.5× 460 2.7× 24 1.3k
Philippe Ledent Belgium 15 532 1.2× 579 1.6× 90 0.3× 198 1.1× 113 0.7× 31 1.1k
Harold R. Perkins Belgium 24 840 1.8× 201 0.5× 431 1.2× 240 1.3× 167 1.0× 40 1.3k
Lucie Gibold France 11 637 1.4× 177 0.5× 166 0.5× 78 0.4× 114 0.7× 16 920
Leo Lin United States 14 524 1.1× 182 0.5× 123 0.3× 92 0.5× 171 1.0× 30 1.1k
Ivan A.D. Lessard United Kingdom 14 391 0.8× 114 0.3× 93 0.3× 115 0.6× 148 0.9× 14 791
Nicola G. Wallis United Kingdom 23 908 2.0× 162 0.4× 249 0.7× 161 0.9× 180 1.1× 45 1.8k
Zhengyu Yuan United States 18 587 1.3× 169 0.5× 494 1.4× 145 0.8× 58 0.3× 29 1.2k

Countries citing papers authored by Penelope N. Markham

Since Specialization
Citations

This map shows the geographic impact of Penelope N. Markham's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Penelope N. Markham with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Penelope N. Markham more than expected).

Fields of papers citing papers by Penelope N. Markham

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Penelope N. Markham. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Penelope N. Markham. The network helps show where Penelope N. Markham may publish in the future.

Co-authorship network of co-authors of Penelope N. Markham

This figure shows the co-authorship network connecting the top 25 collaborators of Penelope N. Markham. A scholar is included among the top collaborators of Penelope N. Markham based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Penelope N. Markham. Penelope N. Markham is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Markham, Penelope N.. (2001). Efflux-mediated drug resistance in Gram-positive bacteria. Current Opinion in Microbiology. 4(5). 509–514. 65 indexed citations
2.
Zheleznova, Ekaterina E., Penelope N. Markham, Rotem Edgar, et al.. (2000). A structure-based mechanism for drug binding by multidrug transporters. Trends in Biochemical Sciences. 25(2). 39–43. 66 indexed citations
3.
Vázquez‐Laslop, Nora, Ekaterina E. Zheleznova, Penelope N. Markham, Richard G. Brennan, & Alexander A. Neyfakh. (2000). Recognition of multiple drugs by a single protein: a trivial solution of an old paradox. Biochemical Society Transactions. 28(4). 517–520. 26 indexed citations
4.
Markham, Penelope N., et al.. (1999). Multiple Novel Inhibitors of the NorA Multidrug Transporter of Staphylococcus aureus. Antimicrobial Agents and Chemotherapy. 43(10). 2404–2408. 189 indexed citations
5.
Vázquez‐Laslop, Nora, Penelope N. Markham, & Alex A. Neyfakh. (1999). Mechanism of Ligand Recognition by BmrR, the Multidrug-Responding Transcriptional Regulator:  Mutational Analysis of the Ligand-Binding Site. Biochemistry. 38(51). 16925–16931. 43 indexed citations
6.
Markham, Penelope N.. (1999). Inhibition of the Emergence of Ciprofloxacin Resistance in Streptococcus pneumoniae by the Multidrug Efflux Inhibitor Reserpine. Antimicrobial Agents and Chemotherapy. 43(4). 988–989. 81 indexed citations
7.
Tambur, Anat R., Penelope N. Markham, & Howard M. Gebel. (1998). IL-4 inhibits P-glycoprotein in normal and malignant NK cells. Human Immunology. 59(8). 483–487. 7 indexed citations
8.
Woolridge, Dale, Nora Vázquez‐Laslop, Penelope N. Markham, et al.. (1997). Efflux of the Natural Polyamine Spermidine Facilitated by the Bacillus subtilis Multidrug Transporter Blt. Journal of Biological Chemistry. 272(14). 8864–8866. 84 indexed citations
9.
Markham, Penelope N., et al.. (1997). Broad Ligand Specificity of the Transcriptional Regulator of theBacillus subtilisMultidrug Transporter Bmr. Biochemical and Biophysical Research Communications. 239(1). 269–272. 17 indexed citations
10.
Markham, Penelope N., Thomas M. Ellis, Anat R. Tambur, & Howard M. Gebel. (1996). DIFFERENTIAL SENSITIVITY OF RESTING AND IL-2 ACTIVATED NK CELLS TO R-VERAPAMIL1,2. Transplantation. 62(12). 1883–1888. 1 indexed citations
11.
Markham, Penelope N., Maqbool Ahmed, & Alexander A. Neyfakh. (1996). The drug-binding activity of the multidrug-responding transcriptional regulator BmrR resides in its C-terminal domain. Journal of Bacteriology. 178(5). 1473–1475. 37 indexed citations
12.
Markham, Penelope N., et al.. (1995). Crime Laboratory Proficiency Testing Results, 1978–1991, I: Identification and Classification of Physical Evidence. Journal of Forensic Sciences. 40(6). 994–1008. 14 indexed citations
13.
Peterson, Joseph L. & Penelope N. Markham. (1995). Crime Laboratory Proficiency Testing Results, 1978–1991, II: Resolving Questions of Common Origin. Journal of Forensic Sciences. 40(6). 1009–1029. 24 indexed citations
14.
Ahmed, Maqbool, et al.. (1995). Two highly similar multidrug transporters of Bacillus subtilis whose expression is differentially regulated. Journal of Bacteriology. 177(14). 3904–3910. 150 indexed citations
15.
16.
Chong, Anita S., Penelope N. Markham, Howard M. Gebel, Steven D. Bines, & John S. Coon. (1993). Diverse multidrug-resistance-modification agents inhibit cytolytic activity of natural killer cells. Cancer Immunology Immunotherapy. 36(2). 133–139. 54 indexed citations
17.
Markham, Penelope N., John S. Coon, Anita S. Chong, & Howard M. Gebel. (1993). Natural killer cell cytotoxicity and the multidrug resistance gene.. PubMed. 25(1 Pt 1). 96–7. 9 indexed citations
18.
Markham, Penelope N., Howard M. Gebel, Steven D. Bines, & John S. Coon. (1993). Short communication Diverse multidrug-resistance-modification agents inhibit cytolytic activity of natural killer cells.
19.
Coon, John S., et al.. (1991). Multidrug resistance activity in human lymphocytes. Human Immunology. 32(2). 134–140. 89 indexed citations
20.
Gebel, Howard M., Penelope N. Markham, Steven D. Bines, et al.. (1991). Inhibition of natural killer cell mediated cytotoxicity by agents that reverse multidrug resistance gene function. Human Immunology. 32. 18–18. 1 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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