Anderson Biophysics Research Group - About Research

About Our Researchers


Principal Investigator

Rae Robertson-Anderson received her PhD in physics from the University of California, San Diego in 2007. Her research, supported by a National Science Foundation Graduate Research Fellowship, focused on understanding molecular transport and intermolecular forces in entangled DNA systems. Following her PhD, Rae spent two years as a postdoctoral researcher in Dr. David Millar’s lab in the Molecular Biology Department at The Scripps Research Institute. Her research at TSRI, supported by a National Institutes of Health Postdoctoral Training Fellowship, employed total internal reflection microscopy to investigate the binding kinetics of the HIV-1 regulatory protein REV to viral RNA.

After first falling in love with physics in high school in Cincinnati, Rae continued to pursue physics as an undergraduate at Georgetown University, funded by a Clare Boothe Luce Undergraduate Scholarship. Rae received a B.S. in Physics from Georgetown in 2003 where her thesis focused on the diffusion of granular material. Because her undergraduate experience had such a powerful impact on her, she wanted to join a physics department at a liberal arts institution that prized undergraduate teaching and research as much what she experienced at Georgetown - which brought her to University of San Diego.

Anderson joined the Department of Physics and Biophysics at USD in 2009. Here she serves as Program Coordinator for the interdisciplinary Biophysics Major, which she designed and introduced in 2011, and has served as Chair of the department since 2015. Anderson has been awarded several prestigious grants during her time at USD including an NSF CAREER Award and an AFOSR Young Investigator Award. She has also been named a Cottrell Scholar, a Councilor for the Council on Undergraduate Research, and USD Undergraduate Research Mentor of the Year.

Dr. Anderson's CV may be accessed here.

Current Researchers

Bekele' Photo Bekele Gurmessa, PhD 
Bekele Gurmessa received his PhD from North Dakota State University department of Physics in 2015. His graduate work focused on exploring the mechanical behavior of nanoscale polymer films and colloidal particle layers. He recently joined our group as a post-doctoral researcher where he is interested in investigating the mechanical properties of biological polymers of varying topologies, stiffnesses and sizes from the molecular-level to mesoscales using optical trapping-coupled with- fluorescence microscopy techniques. Bekele enjoys spending his spare time with his two sons and playing tennis.    

Shea' Photo Shea Ricketts
Shea Ricketts is a Biophysics major and Biomedical Ethics minor who plans to graduate in Spring of 2018. Shea became interested in biophysics when learning about its vast applications to numerous components of the world through the combination of biology, chemistry and physics. She began working in the Anderson Lab during the 2016 summer through SURE, a research grant funded by the University of San Diego. In the lab, Shea studies the relationship between force and deformation in the cytoskeleton. Specifically, she looks at variations in the relative concentrations, lengths and interaction of actin filament and microtubule networks. She hopes to take her research experience to graduate school in order to better understand how cytoskeleton rearrangement impacts motility which influences the early stages of metastasis, tumor cell migration. In addition to her academic career, Shea runs for the Toreros NCAA D1 Women’s Cross Country and Track program, is a core member of USD’s Society of Physics students and an active participant in Faith, Science and Reason Club. As a San Diego native, Shea’s an avid baseball fan (Go Padres!) who loves sunset beach runs, swimming in the ocean, and surfing with the sunrise.    



Ashley' Photo Ashley Messmore
Ashley Messmore is majoring in General Biology at UCSD and plans to graduate in 2017. She was invited to work with the Anderson group as a community college student and NSF REU researcher. In the Anderson lab, Ashley has been working to classify rheological and fluorescent characteristics of the mucus secreted by the marine worm, Chaetopterus variopedatus using optical tweezers and fluorescence spectroscopy. Her interest in the lab’s research began after learning of the interdisciplinary approach used to quantify mechanical properties of biological materials. In addition to her schooling, Ashley enjoys being a mother of two young kids, growing vegetables, painting in acrylics and sewing.


William' Photo Kathryn Regan
Kathryn is a Biophysics major and Math minor planning to graduate in Spring of 2018. She first began working in Dr. Anderson’s lab in November of 2015, focusing her work on the dynamics of crowded and entangled DNA. She continued her research in Summer of 2016 with the aid of a SURE grant, where she focused her studies on the dynamics of DNA and microtubules as quantified through single molecule particle tracking, specifically the diffusion and conformational changes of the DNA molecules as they interact with polymerized and unpolymerized microtubules. In the Anderson lab, she has also taken a lead role in the cultivation and maintenance of DNA stocks of various conformations and topologies. She is passionate about working with DNA due to its biological importance and complexity, and plans on carrying on her academic career in a PhD program in either Biophysics or Bioengineering in the hopes that her previous experience with DNA dynamics can contribute to developments in drug delivery or regenerative medicine techniques. Kathryn also serves as a Residential Assistant to freshmen as well as an active leader of USD’s Society of Physics Students. When she is not in lab, she enjoys hiking, baking with friends, and volunteering with local high school science departments.


Roberts' Photo Robert Fitzpatrick
Robert Fitzpatrick is majoring in Biophysics and is planning to graduate in Fall 2017. He has been interested in Biophysics since learning that the study combines the best of physics, biology, and chemistry to form a new understanding of our world. He hopes to attend medical school after graduation. Robert has been working in Anderson Labs since before his freshman year at USD and as his research continues so does his interest in the field of biophysics. His research focuses on understanding the viscoelastic properties of actin polymer networks and biopolymer blend networks. This research hopes to create a better understanding of cellular and molecular biology and can also lead to new synthetic materials based on the natural phenomena found in actin and other biopolymers. Along with being a full time student and doing research Robert is a member of the Sigma Phi Epsilon Fraternity, a Red Cross Blood Drive Coordinator, volunteer at UCSD Hospital, and member of Society of Physics Students.



Dr. Jennifer Ross is Associate Professor in the Physics Department at UMass, Amherst. We are currently collaborating to create active materials from microtubules and actin coupled to the circadian oscillatory KaiABC system from cyanobacteria. Click here to go to Dr. Ross' webpage.

Dr. Michael Rust is Associate Professor in the Department of Molecular Genetics and Cell Biology at University of Chicago. We are currently collaborating to create active materials from microtubules and actin coupled to the circadian oscillatory KaiABC system from cyanobacteria. Click here to go to Dr. Rust's webpage.

Dr. Dimitri Deheyn is Associate Professor in the Marine Biology Research Division at the Scripps Institution of Oceanography. We are researching the rheological properties and bioluminescence of the mucus produced by chaetopterid marine tube worms. Click here to go to Dr. Deheyn's webpage.

Dr. Omar Saleh is Associate Professor in the Department of Materials and Biomolecular Science & Engineering at UC Santa Barbara. We are researching the salt-dependent microrheological properties of novel aging DNA-star hydrogels. Click here to go to Dr. Saleh's webpage.

Dr.Gregory McKenna, is Professor in the Chemical Engineering Department at Texas Tech University. We are currently collaborating with McKenna to characterize the macroscopic rheological properties of entangled linear and circular DNA, and optimizing purification of long circular DNA molecules. Click here to go to Dr. McKenna's webpage.

Dr. Charles Schroeder, is Associate Professor in the Chemical and Biochemical Engineering Department at UIUC. We are currently collaborating with Schroeder to characterize the single molecule extensional flow dynamics and relaxation of long circular DNA molecules. Click here to go to Dr. Schroeder's webpage.