Ultrafast geminate electron-radical recombination dynamics in photoactive yellow protein Jingyi Zhu, Laura Paparelli, Marijke Hospes, Jos Arents, Klaas Hellingwerf, John T.M. Kennis, Ivo H.M. van Stokkum and Marie Louise Groot EPJ Web of Conferences, 41 (2013) 07010 Published online: 13 March 2013 DOI: 10.1051/epjconf/20134107010