M. Suga, H. Ago, F. Akita, K. Hirata, H. Murakami, Y. Nakajima, \emph{et al.}, "Radiation Damage Free Structure of Photosystem II at 1.95A Resolution", presented at the 37th International Free Electron Laser Conference, Daejeon, Republic of Korea, August 2015, paper FRA01, unpublished.