Entrance to the Fortezza da Basso, where the XX Congress was held in Florence. The images in the archway all appear in the reports in this issue.

Old series (1993-2017)

Editors: William L. Duax, Judith Flippen-Anderson

Contents of issue

Letter from the President

Letter from the President
Yuji Ohashi

Letter to the Editor

Letter to the Editor
Frank Allen

Letter to the Editor

Letter to the Editor
Ewa Skrzypczak-Jankun

IUCr journals news

The ybeY protein from Escherichia coli is a metalloprotein
C. ZhanE. V. Fedorov, W. Shi, U. A. Ramagopal, R. Thirumuruhan, B. A. Manjasetty, S. C. Almo, A. Fiser, M. R. ChanceA. A. Fedorov

IUCr journals news

The spatial structure of dendritic macromolecules
Alexander N. OzerinDmitri I. Svergun, Vladimir V. Volkov, Alexander I. Kuklin, Valentin I. Gordelyi, Akmed Kh. Islamov, Lyudmila A. OzerinaDenis S. Zavorotnyuk

IUCr journals news

Grazing-incidence scattering of coherent X-rays from a liquid surface
A. MadsenT. Seydel, M. TolanG. Grübel

Meeting report

XX Congress and general assembly
Giuseppe InesRay Withers, M. Vijayan, John R. Hellliwell, Peter G. Bruce, Hans-Beat Bürgi, Mitchell Guss, Wulf Depmeier, João Rocha, Jordi Rius-Palleiro, P. Shiv Halasyamani, Elias Vlieg, Robin D. Rogers, Christer Aakeroy, Jonathan W. Steed, Carolyn P. Brock, David Rendle Izumi NakaiMihaly Posfai