Chemical Biology I (Dorothea Fiedler)

Group Leader

Dorothea Fiedler

Dorothea grew up in the most beautiful city in Germany: Hamburg. She went to college at the University of Wuerzburg and did her Diploma work at UC Berkeley. She decided she liked the United States for many reasons that include Thanksgiving (and also German beers are overrated), so she stayed at Berkeley for her Ph.D. She worked in the Raymond and Bergman labs, studying host-guest systems and their application to catalysis. She then moved across the Bay to UCSF, where she joined the Shokat lab to investigate signal transduction pathways. She started her academic career at Princeton University but recently relocated to the FMP, Berlin.

Phone: +49 30 94793 151  |  Email fiedler(at)

Administrative Assistant

Jennifer Trümpler

Jenny grew up in the most “chemical” part of Germany near the Leuna- and Buna-plants. However, she decided to become an animal farmer first. After working in an Irish company for some years, she went back to school to be a bilingual secretary. Assisting the management of a consulting company in Berlin since 2010, she made time to study three evenings a week and graduated in business administration (B.A.). Having found her interest in academia, she switched to the International Office at Eberswalde University for Sustainable Development to support students going abroad and international students studying here. She is happy to assist the Fiedler group in administrative matters. Chocolate is vital for her, she always stores a pile or two in her desk.

                                               Phone: +49 30 94793 150 | Email truempler(at)

Technical Assistants

Katy Franke

Katy was born and raised in the vastness of Brandenburg. During her Abitur she felt that she favors practical work over dry theory. Therefore Katy chose becoming a chemistry laboratory technician over attending university. She started in Potsdam at AnalytiCon AG, later AnalytiCon Dicovery GmbH, and worked on compound libraries based on natural products. Her desire for a change let her defect to Jerini AG in 2006 where she worked in MedChem. In 2009 Katy switched to the compound managment of the Sceening Unit of the FMP. There she familiarized herself with the fascinating side of HPLC and LC/MS based analytics and robots. Since 2015 Katy is part of the Fiedler lab and finds her way through adventurous phosphor-chemistry. She also permanently increases her knowledge of HPLC and LC/MS-                                                       instruments. Katy loves mountains, books and music. Some years ago she found her passion                                                    for Ju-Jutsu.

                                               Phone: +49 30 94793 267  |  Email franke(at)

Lena von Oertzen

Growing up in the beautiful saxon countryside and graduating in Biotechnologie (B.Sc.) in a small town called Zittau, Lena decided it was time for some excitement. Berlin was calling and Lena, preferring good old work in a lab over dry studies, moved to start her first job at Jerini AG searching for small peptide drug compounds. When the company was sold (L. has nothing to do with that) Lena, figuring industry business was not her kind of thing, changed to academia and worked in N. Rajewsky's Lab at the MDC, focussing on microRNA studies in C. elegans, followed by the Haucke Lab at the FMP. She is happy to join the Fiedler Lab to support the biological part of the group and learn something about those phosphates everyone keeps talking about. Lena loves high mountains, swing dancing, cinema and eating a proper steak in Argentina.

                                             Phone: +49 30 94793 265 | Email VonOertzen(at)

Post Docs

Sarah Hostachy

Sarah grew up in Palaiseau, a not-that-small town near Paris. She studied Chemistry and Biology at the Ecole Normale Supérieure and at the Université Pierre and Marie Curie, in the nice Latin Quarter of Paris. Interested by interdisciplinary studies, she stayed there for her PhD and worked in the Policar group on the development of molecular probes for the multimodal imaging of proteins. She then joined the Fiedler lab as a postdoc, where she develops chemical tools to study proteins involved in the inositol pyrophosphate pathway. Besides good food and good wine, she also enjoys Berlin, music and traveling.

Phone: +49 30 94793 277 | Email Hostachy(at)

Jeremy Morgan

Jeremy grew up in Dunedin, at the bottom of the South Island of New Zealand. He completed a BSc (Hons) in Chemistry at the University of Otago, where his dissertation work on catechol-O-methyl transferase inhibitors was undertaken with Eng Wui Tan. He then moved to the Australian National University in Canberra, Australia to find out what it was like to feel his toes all year round. He obtained his PhD under the supervision of Chris Easton, where he investigated mechanisms controlling the biosynthesis of peptide hormones in human cancer cell lines using techniques from analytical chemistry and chemical biology. Having developed an interest in intracellular signalling and wishing to round out his chemical biology skill set, Jeremy joined the group of Dorothea Fiedler as a postdoctoral fellow to investigate the pyrophosphorylation of peptides and proteins. 

                                                Phone: +49 30 94793 264 | Email morgan(at)

Miao Zhang

Even while Miao was in school, she was very interested in mathematics, chemistry, and biology. After finishing her A-levels in Berlin, she decided to stay abroad. She was attracted to the wonderful landscape in Austria and there she completed her bachelors and masters in Biomedical Engineering. Following her research interest in Biology and Protein chemistry she completed her PhD in biochemistry and structural biology in Prof. Zouni´s lab in 2018 at the Humboldt-University in Berlin. Her PhD thesis focused on crystallization of oxygen-evolving Mn-cluster free photosystem II. Since May 2019 Miao jointed Prof. Fiedler´s group to continue her academic career as a postdoc. She is particularly interested in gaining expertise in protein phosphorylation, and the emerging posttranslational modification, pyrophosphorylation. Outside her formal education, she is very interested in travelling and learning languages.

                                              Phone: +49 30 94793 267  |  Email: Zhang(at)

PhD Students

Robert "Robi" Puschmann

Robi, sometimes called Robi-Wan Kenobi for his splendid wisdom, was born and raised in Germany. For his bachelor studies in biochemistry he decided to attend Martin-Luther-University Halle-Wittenberg. For his bachelor thesis he worked in the lab of Elmar Wahle, studying protein arginine methyltransferases. After his graduation he stayed at MLU Halle for their master’s program and went to the US to work with Dorothea Fiedler and write his master thesis on inositol pyrophosphate metabolism in her lab. When Dorothea moved to Germany, he decided to go with her and is now a PhD student in her lab.

Phone: +49 30 94793 267  |  Email puschmann(at)

Robert "Berti" Harmel

Berti was born and raised in Köpenick which is the sunniest part of Berlin. After refusing to become a hipster, he moved to the Netherlands and enjoyed the friendly “gezellig” people and the large diversity of beers while studying organic chemistry. Five years later Berti decided to go back to Berlin but took the wrong turn and found himself at Karolinska Institute in Stockholm for a great internship in chemical biology. However, the upcoming winter promised to bring cold and darkness and drove him back to the sunny part of Berlin where he entertains his colleagues with endless stories of bowling.

Phone: +49 30 94793 266 | Email Harmel(at)

David Furkert

David was born and raised in Berlin; by definition the most interesting city in europe. He grew up in Berlin Marzahn-Hellersdorf, the most underrated area of Berlin. In 8th grade he told his teacher that he will study chemistry and so he studied chemistry at Humboldt University. After his bachelor thesis, where he worked on small molecule FRET sensors for sphingolipids, he decided to join the Fiedler lab for his master thesis. He has a passion for judo, which he is practicing for almost 20 years now.

Phone: +49 30 94793 267 | Email: dfurkert(at)

Sandra Schlomach

Sandra was born and raised in Hamburg, in the north of Germany. Although she knew that she would miss Franzbrötchen and Schietwedder, she decided to go further south and study Biochemistry at the University of Bayreuth (B.Sc.). During her Bachelor's studies she discovered an interest in Organic Chemistry. Therefore she decided to combine both of the fields and study Chemical Biology at the Friedrich-Schiller University of Jena (M.Sc.). She spent one semester abroad at the University of Oulu in the beautiful and cold country of Finland where she went ice hole swimming at -23 °C. In her spare time she loves indoor and outdoor climbing.

 Phone: +49 30 94793 265 | Email: schlomach(at)

Minh Nguyen Trung

Being born in Waren on the Müritz but growing up in the Berlin district Friedrichshain Minh early appreciated the advantages of living in the centre of this manifold city. After his Abitur and a coin toss Minh decided to study chemistry at the Humboldt University where he did his bachelor thesis on organocatalysis. Minh came to the Fiedler group for a short research internship but got stuck here somehow and is currently doing his PhD thesis. In his spare time Minh likes indoor-bouldering, JRPGs, board games and making jokes about the outskirts of Berlin (like Spandau).

Phone: +49 30 94793 265 | Email: nguyentr(at)

Tim Kröber

Tim grew up in the exciting city of Berlin, where he finished high school in 2013. After he couldn't decide whether to study some language or chemistry, he eventually chose the latter and definitely more promising path. For his Bachelor thesis in the Börner group at Humboldt University, and a research internship in the Perrier group at Warwick University, Tim investigated different types of peptide-polymer-conjugates. To broaden his scientific horizon he joined the Fiedler group for his Master thesis and learned a lot about chemical biology. The intriguing project and the nice working atmosphere prompted him to extend his stay for his PhD studies, where he interrogates the inositol pyrophosphate metabolism by a chemical-genetic approach. When he isn't occupied with chemistry, he enjoys playing the incredibly thrilling and upcoming sport Darts -                                                and yes, it is a sport.

                                         Phone: +49 30 94793 277 | Email: kroeber(at)

Leonie "Leo" Kurz

Leo grew up in Stuttgart in the south of Germany and studied biochemistry in the beautiful Hippie-town Tübingen, where she worked on specificity profiling of sortase enzymes in Dirk Schwarzer’s lab. After an MSc. thesis in industry, working with Boehringer-Ingelheim in formulation development of therapeutic antibodies, she decided to come back to academia for her PhD. Ever since her time as an Erasmus student in Uppsala, Sweden, she loves climbing and bouldering, and she stays in contact  with old friends through pen-and-paper games on Skype.

Phone: +49 30 94793 264 | Email: Kurz(at)

Master Students

Simon Bartsch

Simon was born in the West German city of Essen and was raised in Bochum, where he finished school in 2013. After finding out that there are other cities with currywurst he moved to Berlin and started studying chemistry at Humboldt-University. He did his bachelor thesis in the Seitz group where he studied a modification for FIT-PNA probes. After his research internship at BAM in the group of Michael Weller, Simon decided to join the Fiedler group for his master thesis. In his spare time Simon enjoys dancing salsa and visiting football matches.

Phone: +49 30 94793 266 | Email: bartsch(at)

Visiting Scientists

Charlotte Vonstein

First generation American, third generation biologist, born and raised in Chicago. She started at the University of Colorado at Boulder as a geophysics/astrophysics double major. Gradually, it became painfully clear that while Astronomy would remain a lifelong love, biology truly seemed to lie in her genes (sorry.) So once she acquired a bachelor’s in Molecular, Cellular, and Developmental Biology with a minor in Astronomy she decided to keep moving. As the token American of the family, she was driven to Berlin in the hopes of familiarizing herself with her German roots while further exploring her relationship with science. 

Phone: +49 30 94793 265 | Email vonstein(at)

Bachelor Students

Zeinab Fandi

Zeinab was born in Berlin. She grew up there although her origin is from Palestine. After finishing her A-levels in 2016 she wanted to study in the field of natural science. She decided to study Biotechnology at the Beuth University. During her studies, she was inspired by the modules biochemistry, proteomics and genetic engineering. The connection of these modules together is possible in the Fiedler group. That's where she joined for an internship and her bachelor thesis. Other than hard working in the lab, Zeinab enjoys reading books and playing soccer. She loves baking and eating desserts. Honestly, who would resist sweet food?

Phone: +49 30 94793 266 | Email fandi(at)


PhD Students and Post Docs

Cesar Perez Ramirez

Post Doc with Heather Christofk, UC Los Angeles

Nathaniel Walker Brown

PostDoc with Erin Carlson, Univeristy of Minnesota

Javier Moreno

Capgemini S.E.

Alan Marmelstein

Post Doc with Matthew Francis, UC Berkeley

Kok Phin Chooi

Spirogen Ltd.

Jeff Bratz

Lisa Yates

Bristol-Myers Squibb

John Conway

Gilead Sciences, Inc.

Mingxuan Wu

Post Doc with Phil Cole at Harvard University

Florence Williams

Assistant Professor at University of Alberta, Edmonton, Alberta

Barbara Dul

Post Doc with Tom Muir at Princeton University, Princeton, New Jersey

Anastasia Hager

Bayer AG

Vjekoslav Dekaris

Scientific Editor for Chem - Cell Press

Master Students and Visiting Scientists

Dario Demartin

Trainee with F. Hoffmann-La Roche Ltd.

Lucy S. Chong

PhD studies, California Institute of Technology

Natascha Heinsohn

PhD studies

Leibniz-Forschungsinstitut für Molekulare Pharmakologie im Forschungsverbund Berlin e.V. (FMP)
Campus Berlin-Buch
Robert-Roessle-Str. 10
13125 Berlin, Germany
+4930 94793 - 100 
+4930 94793 - 109 (Fax)

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