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Team

Head of Institute
Prof. Dr. Ute Armbruster
Building: 26.24
Floor/room: U1.101
+49 211 81-15791
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Secretary
Sabine May
Building: 26.24.
Floor/room: U1.105
0211-81-13505
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Research associate
Dr. Buket Rüffer
Building: 26.24
Floor/room: U1.103
+49 211 81-14839
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Buket studied biology at Heinrich Heine University, specializing in protein biochemistry. In her doctoral thesis funded by the SFB1208, she worked on the structural characterization of the ETR1 receptor. Her expertise lies in the biochemistry of membrane proteins. This includes expression, protein purification, structural and functional protein analysis, and crystallization. She joined the MolPhoto team in September 2024. Now she is biochemically characterizing chloroplast ion transport proteins, potentially regulated by nucleotides.

PhD student
M. Sc. Sarah Käbe
Building: 26.24
Floor/room: U1.103
+49 211 81-14839
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Sarah is from Germany and studied biochemistry at University of Leipzig and Heinrich-Heine University. Since 2024, she has been a PhD candidate at the Molecular Photosynthesis Institute, focusing on the thylakoid K+/H+ antiporter KEA3. Her research is part of the DFG-funded Research Group GoPMF (ww.uni-muenster.de/GoPMF) and integrates biosensor-based in planta experiments with protein purification, functional and structural analyses to study the role of KEA3 in photosynthesis.

PhD student
M. Sc. Juan Carlos Dávila Frantzen
Building: 26.24
Floor/room: U1.103
+49 211 81-14839
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Juan Carlos is from Guatemala. He studied Molecular Crop Science at University of Bonn and joined the Molecular Photosynthesis Institute as a PhD candidate in 2024. His project focuses on understanding the molecular mechanisms underlying photosystem II (PSII) assembly in eukaryotes. He employs a range of molecular and biochemical methods to characterize the function of eukaryote-specific PSII assembly factors in Arabidopsis thaliana and Chlamydomonas reinhardtii.

PhD Student
M. Sc. Nguyen Quang Huy
Building: 26.24
Floor/room: U1.103

Huy got his Bachelor's degree in Biology from Vietnam National University of Science, and he finished his Master thesis within our group. He is now a PhD student in CEPLAS Graduate School. Huy investigates vascular plant photosynthesis under natural light conditions with a focus on non-photochemical quenching (NPQ) and its interdependence with temperature. Using mathematical modeling and experimental approaches, he aims to determine key factors that define NPQ kinetics and quantify chloroplast temperature during light fluctuations.

PhD student
M. Sc. Jacqueline Fröhnert
Building: 26.24
Floor/room: U1.103
+49 211 81-14953
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Jacqueline studied Biology at Heinrich-Heine University, specializing in biochemical plant physiology, focusing on membrane proteins. After completing her Master's degree, she worked as a scientific associate at a patent law firm in the technical field of patent litigation, concentrating on protein biochemistry, pharmaceuticals, and biotechnology. Actively advancing science in the lab, doing her own research and pursuing her own ideas were the motivation to return from the desk to the lab bench and change the pen to the pipette, so that since October 2024, she has been part of the Molecular Photosynthesis team. Jacqueline investigates the adaptive potential of dynamic photosynthesis in Arabidopsis thaliana, funded and supported by TRR341 Plant Ecological Genetics.

Technical Assistant
M. Sc. Cosima Sies
Building: 26.24
Floor/room: U1.105
+49 211 81-14921
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Master student
B. Sc. Betül Aslantas
Building: 26.24
Floor/room: U1.103

Betül studied Biology at Heinrich Heine University. Since June 2025, she has been investigating how the thylakoid K⁺/H⁺ transporter KEA3 is regulated. Her project focuses on comparing KEA3 regulation in Arabidopsis thaliana and Chlamydomonas reinhardtii — both in vitro, through interaction studies, and in vivo, by analysing growth and NPQ phenotypes. The aim of her work is to uncover potential differences in regulatory mechanisms between the two organisms.

Master student
B. Sc. Jorina Thelen
Building: 26.24
Floor/room: U1.103

Jorina studies biology at Heinrich Heine University Düsseldorf, where she also completed her bachelor's degree. She is currently working on her master's thesis, focusing on the physiological characterization of chloroplast transporter mutants in Arabidopsis thaliana. Her work combines molecular cloning, plant genetics, and chlorophyll fluorescence measurements to investigate how chloroplast ion transport proteins, which are potentially regulated by nuleotides, contribute to the regulation of photosynthesis.

Master student
B. Sc. Naomi Mrochen
Building: 26.24
Floor/room: U1.103

Naomi has been working at the Institute of Molecular Photosynthesis since September to obtain her Master's degree in biology at Heinrich Heine University. Her research focuses on characterizing protein interactions of PSII assembly factors in Arabidopsis thaliana. Using various methods, the aim is to describe the protein interaction network required for PSII assembly.

Bachelor student
Mariam Elbakosh
Building: 26.24
Floor/room: U1.103
Bachelor student
Helen Petry
Building: 26.24
Floor/room: U1.105
Bachelor student
Ndeyharr Ceesay
Building: 26.24
Floor/room: U1.105
Bachelor student
Annika Maß
Building: 26.24
Floor/room: U1.105
Bachelor student
Maria Paula Moreno
Building: 26.24
Floor/room: U1.105
Bachelor student
Lotta Röpke
Building: 26.24
Floor/room: U1.105
Bachelor student
Finja Kunadt
Building: 26.24
Floor/room: U1.105
Bachelor student
Christoph Leander Brennig
Building: 26.24
Floor/room: U1.105
Bachelor student
Betül Saglam
Building: 26.24
Floor/room: U1.105
Bachelor student
Nina Kluth
Building: 26.24
Floor/room: U1.105
Student helper
M. Sc. Isabell Andree
Building: 26.24
Floor/room: U1.105

Alumni

Dr. Zhifeng Lu

M. Sc. Milena Lange
M. Sc. Isabell Andree
M. Sc. Rebecca Lücke

Dr. Thekla von Bismarck
Dr. Parisa Rahimzadeh Karvansara
Dr. Thibault Kosuth

B. Sc. Isabella Mock
B. Sc. Bogdan Khomenko
B. Sc. Kim Rosenberg
B. Sc. Mercedes Peragallo-Boxler

B. Sc. Sebastian Puglisi
B. Sc. Yannis Jakob
B. Sc. Nidhi Kulkarni