[1] CNRS, UMR8197, ENS, Inst Biol, Paris, France
[2] INSERM, U1024, ENS, Inst Biol, Paris, France
[3] Univ Paris Diderot, Univ Paris 06, Lab Phys Stat, ENS,CNRS, Paris, France
[4] Inst Biol Physicochim, Paris, France
[5] Maharaja Sayajirao Univ Baroda, Dept Phys, Vadodara, Gujarat, India