Hoelz Lab: Current Lab Members
Hoelz Lab: Current Lab Members
Prof. Dr. André Hoelz
Mary and Charles Ferkel Professor of Chemistry and Biochemistry
Ph.D. Structural Biology and Biochemistry, The Rockefeller University (2003)
M.Sc. (Diplom) Chemistry and Biochemistry, University of Freiburg, Germany (1997)
B.Sc. (Vordiplom) Chemistry, University of Freiburg, Germany (1993)
hoelz at caltech.edu CV
Dr. Christopher J. Bley
Lab Manager and Staff Scientist (March 2012 - present)
Safety Officer
Ph.D. Biochemistry, Arizona State University (2011)
M.Sc. Biochemistry, Arizona State University (2008)
B.Sc. Biochemistry and Molecular Biology, University of California, Davis (2004)
cjbley at caltech.edu
Dr. George Mobbs
Staff Scientist (December 2023 - present)
Senior Postdoctoral Scholar (December 2014 - December 2023)
Ph.D. Structural Biology - The University of Sheffield (2014)
M. BiolSci. Biochemistry - The University of Sheffield (2010)
B. Sc. Medical Biochemistry - The University of Sheffield (2009)
gmobbs at caltech.edu
Staff
Graduate Students
Postdoctoral Scholars
Undergraduate Researchers
Back Row: Stefan, George, Raphael, Sabrina, Michael, André, Chris, Vali, Jakub
Front Row: Chia-yu, Denise, Katharina, Michelle, Sema, Ryan, Thomas, Ioana, Narek
Dr. Songhao Zhao
Postdoctoral Scholar (September 2021 - present)
Ph.D. Cell Biology, Institute of Botany, Chinese Academy of Science, China (2020)
M.Eng. Environmental Science and Engineering, Tsinghua University, China (2013)
songhao at caltech.edu
Dr. Stefan Petrovic
Postdoctoral Scholar (June 2022 - present)
Graduate Student (April 2015 - June 2022)
Ph.D Biochemistry and Molecular Biophysics, Caltech (2022)
B.Sc. Cell Biology / Biochemistry, Bucknell University (2014)
spetrovi at caltech.edu
Dr. Sema Ejder
Postdoctoral Scholar (July 2021 - present)
Ph.D. Structural Biology and Biochemistry, Newcastle University, UK (2021)
M.Sc. Bioinformatics and Structural Biology, Strasbourg University, France (2017)
B.Sc. Biomedical Sciences, Napier University, UK (2013)
sejder at caltech.edu
Dr. Narek Yousefian
Postdoctoral Scholar (September 2021 - present)
Double joint Ph.D. Biochemistry, Goethe University Frankfurt, Germany and University of Bordeaux, France (2020)
M.Sc. Biochemisty, University of Bordeaux, France (2016)
B.Sc. Microbiology, Cell and Molecular Biology, University of Pau, France (2014)
narek at caltech.edu
Michael Gruhne
Graduate Student (October 2021 - present)
M.Sc. Chemistry, LMU Munich, Germany (2020)
B.Sc. Chemistry and Biochemistry, LMU Munich, Germany (2018)
mgruhne at caltech.edu
Chia Yu Chien
Graduate Student (March 2020 - present)
M.Sc. Plant Biology, National Taiwan University, Taiwan (2014)
B.Sc. Life Science, National Taiwan University, Taiwan (2012)
ccchien at caltech.edu
Dr. Joel Ehrenkranz
Visiting Associate (September 2021 - present)
MD Stanford University School of Medicine (1977)
A.B. Amherst College (1973)
jrle at caltech.edu
High School Researchers
Sofie Wong
High School Student Researcher (July 2023 - present)
High School Senior
Supervised by Chia-Yu Chien
Sabrina Doerrich
Graduate Student (February 2023 - present) *Co-supervised with Alina Patke
Visiting Masters Student (December 2021 - July 2022)
M.Sc. Chemistry, LMU Munich, Germany (2022)
B.Sc. Chemistry and Biochemistry, LMU Munich, Germany (2020)
doerrich at caltech.edu
Mission Statement
The Hoelz group applies interdisciplinary structural cell biology to understand the molecular basis of nucleocytoplasmic transport. We are an internationally diverse community that leverages a broad range of expertise, teamwork, and curiosity to aim for the highest levels of scientific rigor and intellectual excellence. We foster a collegial and inclusive environment that celebrates individual and group successes where knowledge and ideas are freely shared through mentorship and collaboration. Our everyday efforts are dedicated to Caltech’s mission to “expand human knowledge and benefit society through research integrated with education.”
Ryan Delmore
Graduate Student (September 2023 - present)
B.Sc. Biochemistry, California State University, Bakersfield (2023)
US Navy onboard USS Nimitz 2013-2018
rdelmore at caltech.edu
Michelle O’Camb
Administrative Assistant
mocamb at caltech.edu
California Institute of Technology
Division of Chemistry & Chemical Engineering
1200 E. California Blvd.
Pasadena, CA 91125-7200
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Contact Web Manager Last Updated 8/25/2014
Jakub Ettrich
Graduate Student (April 2024 - present)
B.Sc. Chemistry, Biochemistry specialization, Barry University (2023)
jettrich at caltech.edu
Ioana Caraus
Undergraduate Researcher (March 2024 - present)
Sidney and Nancy Petersen SURF Fellow (2024)
California Institute of Technology, Chemistry Major, Second Year
Supervised by Chia-yu Chien
icaraus at caltech.edu
Katelynn Horvath
Amgen Scholar (June 2024 - present)
University of Connecticut, Biomolecular Engineering Major, Fourth Year
Supervised by Sema Ejder
khorvath at caltech.edu
Emily Yu
Undergraduate Researcher (June 2024 - present)
Ronan Armaan Mack SURF Fellow (2024)
California Institute of Technology, Chemistry Major, Second Year
Supervised by Narek Yousefian
eqyu at caltech.edu
Josh Signore
Rotating Graduate Student (August 2024 - present)
M.A. Chemistry, Wesleyan University (2021)
B.A. Chemistry, Wesleyan University (2019)
jsignore at caltech.edu