Contributions by: Paul D Adams, Pavel V Afonine, Xiao-chen Bai, Matthew L. Baker, Anchi Cheng, Yifan Cheng, Radostin Danev, Timothy Grant, Basil J Greber, Nikolaus Grigorieff, Patricia Grob, J Bernard Heymann, Benjamin A Himes, Corey F Hryc, Brian P Hudson, Agnel Praveen Joseph, Catherine L Lawson, Dorothee Liebschner, Steven Ludtke, Dmitry Lyumkis, Sony Malhotra, Takanori Nakane, Melanie D Ohi, Grigore Pintilie, Jane S Richardson, Alexis Rohou, Peter B Rosenthal, John L Rubinstein, Sjors H. W. Scheres, Dimitry Tegunov, Thomas C. Terwilliger, Rebecca F. Thompson, Maya Topf, Jasenko Zivanov