Lab Members

Lab Members Group Shot
Suckjoon Jun [PI, Physics and Molecular Biology]
Allen Distinguished Investigator, Pew Scholar,
NSF CAREER awardee, Scialog Fellow
Research Interest: "Charlie Chaplin goes to the biology lab"
[email] [office 858-534-2384, UH6250] [lab 858-822-1090, UH6249]
[brief biography] [Google scholar] [CV]
Sarah Cox
Sarah Cox [lab manager and staff research assistant] [email]
Fangwei Si
Fangwei Si [postdoc] [email] [lab 858-822-1090, UH6249]
I received a BS in Mechanics from Peking University in 2009. In 2015, I received a PhD in Mechanical Engineering from Johns Hopkins where I studied biomechanics of cell division and growth supervised by Prof. Sean Sun. Now I’m a postdoc in the Jun lab to study mechanisms of bacterial growth and size regulation by means of quantitative measurement.
Guillaume Le Treut
Guillaume Le Treut [postdoc] [email] [lab 858-822-1090, UH6249]
I received my Master degree in Science and Engineering from Mines Paristech in 2011. I then received a PhD in Physics from Université Paris-Saclay in 2016. During my doctoral training, supervised by Henri Orland and François Képès, I studied the effect of DNA-binding proteins on the chromosome architecture, which I tried to relate to genes expression. I am now a postdoc in the Jun lab. I am looking to come up with a model of the cell cycle, built from experimental observations, that bridge the gap between well known results valid for a population of bacteria cells, such as the growth law, and more recent findings at the single cell level, such as the adder principle.
Dongyang Li
Dongyang Li [graduate student] [email] [lab 858-822-1090, UH6249]
I received my BSc in biology from Peking University before moving to San Diego in pursuit of my doctoral degree in the Division of Biological Sciences at UCSD. In the Jun Lab, I'm following my passion for imaging and quantitative analysis to study how E. coli coordinates the demand of chromosome replication and cell growth.
JT Sauls
JT Sauls [graduate student (UCSD BISB)] [email]
I received my BSc and MSc in Bioengineering from UPenn in Philly, where I sailed and studied how the cell experiences the sense of touch. I then worked at Ginkgo Bioworks, in Boston, and at BRAIN A.G. in Zwingenberg, Germany, realizing that the microbe is the most beautiful machine. I hope to understand that machine not just as a tinkerer but as a true engineer--one who uses quantitative laws and evidence to design and build. Towards that goal, I am investigating the bacterial cell cycle, and how a single cell can harmonize chromosome replication, growth, division, and size.
JT Sauls's Hobby
Daniel Villarreal
Daniel Villarreal
Position: lab assistant, undergrad, biophysics
I had transferred from Mt. San Jacinto College to major in Physics: Biophysics here at UCSD. I'm currently working in the Jun Lab to further educate and prepare myself for graduate school in fields related to both physics and biology, to further attempt our understanding the physics of biological entities.
Aaron Ren
Aaron Ren
Position: lab assistant, undergrad, biophysics
I started my university education, majoring Biophysics, in UCSD as an international student from China. I'm currently working in the Jun Lab as an undergrad research assistant and I hope to gain valuable wet lab experience and bio-related methodology in this lab so I can be better prepared for grad school life and prime myself for the future research as I continue my study in biophysics. Moreover, working in this lab enables me to see a more quantitative and physical aspect of biological study and makes me begin to consider the kind of approach that I should employ in my pursuit to understanding the underlying physical mechanism in a biological phenomenon.

Former Members

  • Project scientists

    • Xintian Li (Senior Scientist, NCI/NIH)
      Xintian single-handedly established molecular biology and bacterial genetics platforms in our lab. In particular, his CRISPR interference system is posed to make a long-term impact in various fields. As a long-term collaborator of our lab, Xintian is still involved in most of our E. coli projects.
    • Yonggun Jun (associate professor in physics at NCU, Taiwan)
      Yonggun has made critical contributions to a range of projects by writing image analysis software, turbidostat analysis software, microscope control software, and building an optical trap coupled to a microscope. These are actively being used in multiple projects in my lab.
  • Post-docs

    • Sattar Taheri (assistant professor in physics at California State University, Northridge)
      Suffice to say that Sattar discovered the adder principle of size homeostasis in bacteria, one of the most important discoveries of our lab.
    • Mike Erickstad (industry)
      Mike was traind in instrumentation in Alex Groisman's lab at UCSD Physics. In our lab, Mike transformed the way we do experiments by developing multiplexed turbidostats (with JT Sauls, grad student) and, equally important, 2-photon fabrication of next-generation mother machines. We expect these in-house technologies to bear fruit for many years to come. We will make the information for our approaches publicly available at some point in the future.
    • Steve Brown (post-doc, UCSD Medical School)
      Steve contributed to a range of problems in our lab from high-throughput imaging, bioinformatics, and pioneering recombineering in E. coli NCM strains. He moved on to take up a new challenge in microbiome - research field currently in its exponential expansion phase - at UCSD Medical School.
    • Dustin McIntosh (Google)
  • Rotation students

    • Marco Man-ho Tang (Phsyics, 2017), Anamika Agrawal (Physics, 2016), Gautam Reddy (Physics, 2013), Grant Allen (Physics, 2013), Alan Chang (Physics, 2013; now in Silicon Valley), Joey Ostrand (Bio, 2012), Greg Peters (Bio, 2012), Molly Allen (BioE, 2013)
  • Visitors

    • Mikkel Svenningsen (Visiting PhD student, Niels Bohr Institute, Denmark, 2018)
      Mikkel visited our lab to study bacteria persisters using mother machine.
    • Jacopo Solari (Visiting PhD student, AMOLF, Netherland, 2017)
      Jacopo visited our lab to work on chromosome oraganization in crowded environment.
    • Ashley Cadby (Senior Lecturer, Univ. Sheffield, UK: sabbatical 01/2016-08/2016)
      Dr. Cadby has developed important single-cell imaging and manipulation techniques with us and will be visiting every summer.
    • Liyana Peedikakkal (PhD student, Univ. Sheffield)
      Liyana visited our lab with Dr. Cadby during his sabbatical.
    • Kazuki Yoda (Visiting undergraduate researcher, University of Tokyo, 2016)
    • Benjamin Escudero (Visiting for a diplomat project, École Normale Supérieure, Paris, France, 2015)
  • Undergraduate students

    • Victoria Castillo (undergrad in human bio and marine bio)
      Victoria helped running the lab by working on the paperworks and lab chores. She also devoted herself to studying cell size control mechanism in B. subtilis. by running turbidostat experiments and related measurements.
    • Quynh Do (undergrad in bioengineering)
      Quynh worked in the lab as a lab assistant who developed an interest in doing science. She spearheaded beautiful mother machine experiments that help us better understand B. subtilis. physiology and helped 3D printing experimental instruments for mother machine experiments.
    • Cindy Sou (undergrad in biochemistry and cell biology)
      Cindy worked in our lab for two and a half years where she quickly picked up bacterial genetics from Xintian. She was involved in developing and applying tCRISPRi system to some of the key research in the lab.
    • Zulfar Ghulam-Jelani (undergrad in bioengineering and physics)
      Zulfar worked in the lab for more than a year. She helped build a multiplex turbidostat and pioneered a project to bacterial physiology and its relation to cell size and other cell characteristics in Bacillus subtilis. She has started her PhD program at Duke University in the fall of 2017.
    • Omid Azizi (undergrad in bioengineering)
      Omid worked in our lab for 3 years as an undergrad researcher between 2013-2016, and his work has resulted in one publication.
    • Amy Schwartz (undergrad in bioengineering; PhD student in UCSD Nanoengineering)
      Amy was a captain of UCSD Women’s soccer team for 4 years. She worked in our lab for 2 years between 2014-2016, and her undergrad research work resulted in two publications as well as the prestigious John Holmes Malmberg Prize given two two graduating students at UCSD Physics.
    • Lauren Fong (Bio, 2015-2016)
      Xiaowen Wang (Bio, 2014)
      Casey Edwards (Phys, summer 2014)
      Eden Aklile (Chem, 2012-2013)
      Ayat Amin (Phys, 2012-2013)
      Kiana Miyamoto (Bio)
      Calvin Feng (Phys)
      Jonathan Loi (Phys)
      Clarence Tan (Eng)
  • High-school students

    • Tina Quach (Westview High, 2013; now undergrad at MIT)
      Tony Cao (Westview High, 2013; now undergrad at MIT)
  • Staffs

    • Farinaz Babaepour (2012-2013)
    • Vyshnavi Balakrishnan (2016-2017)