Physical Questions Posed by DNA Condensation
  When multivalent salts are added to dilute DNA solution, the DNA chains condense into bundles of a well-defined size. We explore two physical problems motivated by this phenomenon: the origin of the attractive interactions between the highly-negatively charged DNA chains that cause them to concentrate into bundles, and the mechanism that provents the bundles from growing indefinitely large. 
Bae-Yeun Ha (SFU), Andrea J. Liu (UCLA)