Skip to main content

Ken Ritchie

NOTE: E-mail addresses end with

Ken Ritchie
PHYS 90 (Lab)
(765) 496-8315
(765) 494-2500

Laboratory homepage


B.Sc., M.Sc. Physics, University of Waterloo
Ph.D., Physics, University of British Columbia

Research Interests
  • Dynamics of the formation of signaling complexes in the plasma membrane of cells.
  • Stochasticity in signaling responses
  • Diffusion in lipid bilayer membranes with embedded mobile and immobile obstacles.
  • Development of ultra-fast imaging techniques for observing individual molecules in living cells.
  • Single molecule biophysics.

Professional Experience
  • 2015-Present Associate Head, Department of Physics and Astronomy, Purdue University
  • 2012-Present Professor, Department of Physics and Astronomy, Purdue University
  • 2005-2012 Associate Professor, Department of Physics and Astronomy, Purdue University
  • 2000-2005 Assistant professor, Department of Biological Science, Nagoya University, Nagoya, Japan
  • 1998-2003 Group leader and researcher, Kusumi Membrane Organizer Project, ERATO, Japan Science and Technology Co., Nagoya, Japan

PhD Students Supervised

  • Shunyuan Zhang, “Mobility of prostate-specific membrane antigen (PSMA) on LNCaP cells”, 2014
  • Chetan Sood, “Measuring and Modeling The Response Characteristics Of The Environmental Phosphate Transducer In Escherichia Coli”, 2013
  • Hochan Lee, “A FRET study of PhoR-PhoB two component system in E.coli”, 2013.
  • Alyssa Garrelts, “Dynamics of lipid analogs in the E. coli outer membrane”, 2011
  • Jacob Hale, “Physical interactions of membrane receptors of two human cancer cell lines”, 2011
  • Dongmyung Oh, “Single molecule studies of receptor proteins of Escherichia coli”, 2010.
  • Jeffrey Spector, “Diffusion properties of band 3 in human erythrocytes”, 2009
  • Gina-Mirela Mustata, “Imaging the fine-scale structure of the cellular actin cytoskeleton by Single Particle Tracking and Atomic Force Microscopy”, 2008

Selected Publications

  1. Dynamics of the serine chemoreceptor in the Escherichia coli inner membrane: a high-speed single-molecule tracking study
    D Oh, Y Yu, H Lee, BL Wanner, K Ritchie
    Biophysical journal 106 (1), 145-153, 2014.
  2. Energy-dependent motion of TonB in the Gram-negative bacterial inner membrane
    LD Jordan, Y Zhou, CR Smallwood, Y Lill, K Ritchie, WT Yip, SM Newton, PE Klebba
    Proceedings of the National Academy of Sciences 110 (28), 11553-11558, 2013.
  3. Single-molecule imaging in live bacteria cells
    K Ritchie, Y Lill, C Sood, H Lee, S Zhang
    Phil Trans Royal Soc B 368, 20120355, 2013.
  4. Single-molecule study of molecular mobility in the cytoplasm of Escherichia coli
    Y Lill, WA Kaserer, SM Newton, M Lill, PE Klebba, K Ritchie
    Physical Review E 86 (2), 021907, 2012.

Google Scholar Publication List

Last Updated: Jul 25, 2023 9:47 AM

Department of Physics and Astronomy, 525 Northwestern Avenue, West Lafayette, IN 47907-2036 • Phone: (765) 494-3000 • Fax: (765) 494-0706

Copyright © 2023 Purdue University | An equal access/equal opportunity university | Copyright Complaints

Trouble with this page? Disability-related accessibility issue? Please contact the College of Science.