Pascale Changenet is a CNRS senior researcher in the Laboratory of Optics and Biosciences at Ecole Polytechnique (Palaiseau, France). Her research focuses on the study of elementary photoinduced processes in proteins and nucleic acids using various ultrafast pump-probe spectroscopy techniques. She is currently developing time-resolved chiroptical spectroscopy methods to observe the conformational changes of small chiral organic/inorganic compounds and non-canonical DNA structures on time scales ranging from femtoseconds to seconds.