Jan Kern

14.4k total citations · 5 hit papers
87 papers, 8.0k citations indexed

About

Jan Kern is a scholar working on Molecular Biology, Materials Chemistry and Atomic and Molecular Physics, and Optics. According to data from OpenAlex, Jan Kern has authored 87 papers receiving a total of 8.0k indexed citations (citations by other indexed papers that have themselves been cited), including 62 papers in Molecular Biology, 25 papers in Materials Chemistry and 23 papers in Atomic and Molecular Physics, and Optics. Recurrent topics in Jan Kern's work include Photosynthetic Processes and Mechanisms (59 papers), Spectroscopy and Quantum Chemical Studies (23 papers) and Enzyme Structure and Function (22 papers). Jan Kern is often cited by papers focused on Photosynthetic Processes and Mechanisms (59 papers), Spectroscopy and Quantum Chemical Studies (23 papers) and Enzyme Structure and Function (22 papers). Jan Kern collaborates with scholars based in United States, Germany and Sweden. Jan Kern's co-authors include Athina Zouni, Wolfram Saenger, Bernhard Loll, Jacek Biesiadka, Petra Fromme, Peter Orth, Junko Yano, Norbert Krauß, H. T. Witt and Matthias Broser and has published in prestigious journals such as Nature, Science and Proceedings of the National Academy of Sciences.

In The Last Decade

Jan Kern

84 papers receiving 7.9k citations

Hit Papers

Crystal structure of photosystem II from Synechococcus el... 2001 2026 2009 2017 2001 2005 2009 2006 2023 500 1000 1.5k
What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

  1. Crystal structure of photosystem II from Synechococcus elongatus at 3.8 Å resolution
    2001 1.5k citations Athina Zouni, Jan Kern et al. profile →
  2. Towards complete cofactor arrangement in the 3.0 Å resolution structure of photosystem II
    2005 1.5k citations Bernhard Loll, Jan Kern et al. profile →
  3. Cyanobacterial photosystem II at 2.9-Å resolution and the role of quinones, lipids, channels and chloride
    2009 949 citations Jan Kern, Athina Zouni et al. profile →
  4. Where Water Is Oxidized to Dioxygen: Structure of the Photosynthetic Mn 4 Ca Cluster
    2006 662 citations Junko Yano, Jan Kern et al. Science profile →
  5. Solar energy conversion by photosystem II: principles and structures
    2023 103 citations Dmitriy Shevela, Jan Kern et al. Photosynthesis Research profile →

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Jan Kern United States 34 5.9k 2.3k 2.1k 1.9k 1.8k 87 8.0k
Athina Zouni Germany 37 6.6k 1.1× 2.5k 1.1× 2.0k 1.0× 2.2k 1.2× 1.7k 0.9× 98 8.3k
Petra Fromme United States 41 6.7k 1.1× 2.3k 1.0× 1.5k 0.7× 2.6k 1.4× 758 0.4× 131 8.4k
Johannes Messinger Sweden 49 5.7k 1.0× 2.9k 1.3× 3.2k 1.5× 1.5k 0.8× 2.4k 1.3× 140 9.1k
Keisuke Kawakami Japan 26 4.0k 0.7× 1.8k 0.8× 1.8k 0.9× 1.4k 0.7× 1.2k 0.7× 68 5.6k
Vittal K. Yachandra United States 55 5.4k 0.9× 2.6k 1.1× 4.5k 2.1× 1.2k 0.6× 3.8k 2.1× 139 11.9k
Kenneth Sauer United States 64 9.8k 1.7× 5.0k 2.1× 2.5k 1.2× 3.2k 1.7× 3.0k 1.7× 215 12.8k
Yasufumi Umena Japan 24 3.7k 0.6× 1.6k 0.7× 1.8k 0.9× 1.2k 0.7× 1.2k 0.7× 53 5.3k
Yulia Pushkar United States 35 1.9k 0.3× 972 0.4× 1.6k 0.7× 624 0.3× 1.7k 0.9× 99 4.5k
Jacek Biesiadka Germany 21 2.9k 0.5× 1.1k 0.5× 998 0.5× 928 0.5× 922 0.5× 32 3.9k
Melvin P. Klein United States 45 3.9k 0.7× 1.7k 0.7× 833 0.4× 794 0.4× 1.9k 1.1× 101 6.6k

Countries citing papers authored by Jan Kern

Since Specialization
Citations

This map shows the geographic impact of Jan Kern'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 Jan Kern with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Jan Kern more than expected).

Fields of papers citing papers by Jan Kern

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Jan Kern. 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 Jan Kern. The network helps show where Jan Kern may publish in the future.

Co-authorship network of co-authors of Jan Kern

This figure shows the co-authorship network connecting the top 25 collaborators of Jan Kern. A scholar is included among the top collaborators of Jan Kern 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 Jan Kern. Jan Kern 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.
Lee, Chi Chung, Kuntal Chatterjee, Junko Yano, et al.. (2025). Belt-sulfur mobilization as a crucial mechanistic feature shared between the vanadium and molybdenum nitrogenases. Chem Catalysis. 5(7). 101366–101366.
2.
Makita, Hiroki, Philipp S. Simon, Jan Kern, Junko Yano, & Vittal K. Yachandra. (2023). Combining on-line spectroscopy with synchrotron and X-ray free electron laser crystallography. Current Opinion in Structural Biology. 80. 102604–102604. 5 indexed citations
3.
Doyle, Margaret, Asmit Bhowmick, Louise Lassalle, et al.. (2023). Water Networks in Photosystem II Using Crystalline Molecular Dynamics Simulations and Room-Temperature XFEL Serial Crystallography. Journal of the American Chemical Society. 145(27). 14621–14635. 19 indexed citations
4.
Bogacz, Isabel, Hiroki Makita, Philipp S. Simon, et al.. (2023). Room temperature X-ray absorption spectroscopy of metalloenzymes with drop-on-demand sample delivery at XFELs. Pure and Applied Chemistry. 95(8). 891–897. 3 indexed citations
5.
Shevela, Dmitriy, Jan Kern, Govindjee Govindjee, & Johannes Messinger. (2023). Solar energy conversion by photosystem II: principles and structures. Photosynthesis Research. 156(3). 279–307. 103 indexed citations breakdown →
6.
O’Dell, William B., Martin Egli, Jan Kern, et al.. (2022). EWALD: A macromolecular diffractometer for the second target station. Review of Scientific Instruments. 93(6). 64103–64103. 3 indexed citations
7.
Bergmann, Uwe, Jan Kern, R. W. Schoenlein, et al.. (2021). Using X-ray free-electron lasers for spectroscopy of molecular catalysts and metalloenzymes. Nature Reviews Physics. 3(4). 264–282. 57 indexed citations
8.
Milikisiyants, Sergey, et al.. (2020). Electronic Structure of the Primary Electron Donor P700+• in Photosystem I Studied by Multifrequency HYSCORE Spectroscopy at X- and Q-Band. The Journal of Physical Chemistry B. 125(1). 36–48. 4 indexed citations
9.
Kröll, Thomas, Clemens Weninger, Franklin D. Fuller, et al.. (2020). Observation of Seeded Mn Kβ Stimulated X-Ray Emission Using Two-Color X-Ray Free-Electron Laser Pulses. Physical Review Letters. 125(3). 37404–37404. 19 indexed citations
10.
Sauter, Nicholas K., Jan Kern, Junko Yano, & James M. Holton. (2020). Towards the spatial resolution of metalloprotein charge states by detailed modeling of XFEL crystallographic diffraction. Acta Crystallographica Section D Structural Biology. 76(2). 176–192. 13 indexed citations
11.
Chatterjee, Ruchira, Clemens Weninger, Sheraz Gul, et al.. (2019). XANES and EXAFS of dilute solutions of transition metals at XFELs. Journal of Synchrotron Radiation. 26(5). 1716–1724. 14 indexed citations
12.
Chatterjee, Ruchira, Louise Lassalle, Sheraz Gul, et al.. (2019). Structural isomers of the S2 state in photosystem II: do they exist at room temperature and are they important for function?. Physiologia Plantarum. 166(1). 60–72. 28 indexed citations
13.
Kubin, Markus, Meiyuan Guo, Thomas Kröll, et al.. (2018). Probing the oxidation state of transition metal complexes: a case study on how charge and spin densities determine Mn L-edge X-ray absorption energies. Chemical Science. 9(33). 6813–6829. 67 indexed citations
14.
Fransson, Thomas, Ruchira Chatterjee, Franklin D. Fuller, et al.. (2018). X-ray Emission Spectroscopy as an in Situ Diagnostic Tool for X-ray Crystallography of Metalloproteins Using an X-ray Free-Electron Laser. Biochemistry. 57(31). 4629–4637. 29 indexed citations
15.
Koralek, J. D., Jongjin B. Kim, Petr Brůža, et al.. (2018). Generation and characterization of ultrathin free-flowing liquid sheets. Nature Communications. 9(1). 1353–1353. 84 indexed citations
16.
Yano, Junko, Jan Kern, Yulia Pushkar, et al.. (2007). High-resolution structure of the photosynthetic Mn4Ca catalyst from X-ray spectroscopy. Philosophical Transactions of the Royal Society B Biological Sciences. 363(1494). 1139–1147. 34 indexed citations
17.
Yano, Junko, Jan Kern, Kenneth Sauer, et al.. (2006). Where Water Is Oxidized to Dioxygen: Structure of the Photosynthetic Mn 4 Ca Cluster. Science. 314(5800). 821–825. 662 indexed citations breakdown →
18.
19.
Zouni, Athina, Jan Kern, Petra Fromme, et al.. (2001). Crystal structure of Photosystem II and aspects of its function. Science Access. 3(1). 2 indexed citations
20.
Zouni, Athina, Jan Kern, Bernhard Loll, et al.. (2001). Biochemical characterization and crystal structure of water oxidizing Photosystem II from Synechococcus elongatus. Science Access. 3(1). 17 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.

Explore authors with similar magnitude of impact

Breakdown of academic impact, for papers by Athina Zouni Breakdown of academic impact, for papers by Petra Fromme Breakdown of academic impact, for papers by Johannes Messinger Breakdown of academic impact, for papers by Keisuke Kawakami Breakdown of academic impact, for papers by Vittal K. Yachandra Breakdown of academic impact, for papers by Kenneth Sauer Breakdown of academic impact, for papers by Yasufumi Umena Breakdown of academic impact, for papers by Yulia Pushkar Breakdown of academic impact, for papers by Jacek Biesiadka Breakdown of academic impact, for papers by Melvin P. Klein
Rankless by CCL
2026