Ralf Blossey is a Research Director at the French National Center for Scientific Research, the CNRS, and is based in Lille, in the North of France. His work during the last fifteen years has focussed on the application of statistical mechanics methods to DNA, proteins, gene regulatory networks and chromatin. He has collaborated with many scientists from computer science, mathematics, computational biology, molecular and cellular biology, as well as colleagues from his original field of training, statistical physics.