Optimal target search on a fast folding polymer chain with volume   exchange
  We study the search process of a target on a rapidly folding polymer (`DNA') by an ensemble of particles (`proteins'), whose search combines 1D diffusion along the chain, Levy type diffusion mediated by chain looping, and volume exchange. A rich behavior of the search process is obtained with respect to the physical parameters, in particular, for the optimal search. 
Michael A. Lomholt, Tobias Ambjornsson, and Ralf Metzler (Nordic   Institute for Theoretical Physics - NORDITA, Copenhagen)