Crystals on the cover for 2009

PO Box 6395, Lawrenceville, NJ 08648-0395, USA, and EMBL Hamburg Outstation, c/o DESY, Notkestrasse 85, D-22603 Hamburg, Germany The January issue of Acta Crystallographica Section F traditionally highlights the crystallization content of our journal with a cover illustration composed of the past years best in crystal photomicrographs. This year is no exception. The design is again the work our Technical Editor Louise E. Jones ([email protected]) and her talent shines through as before. The articles providing images are from Acta Cryst. F64 (2008). Top row: the peroxiredoxin domain of a larger natural hybrid protein from Thermotoga maritima (Barbey et al., pp. 29–31); adeno-associated virus serotype 6 (Xie et al., pp. 1074–1078); and the bifunctional enzyme proline utilization A (PutA) from Bradyrhizobium japonicum (Schuermann et al., pp. 949–953). Middle row: S-adenosyl-l-homocysteine hydrolase from Lupinus luteus in complex with adenosine (Brzezinski et al., pp. 671–673); mannosyl-3-phosphoglycerate synthase from Rubrobacter xylanophilus (Sá-Moura et al., pp. 760–763); and flavodoxin NifF from the photosynthetic bacterium Rhodobacter capsulatus (Pérez-Dorado et al., pp. 375–377). Bottom row: polyketide synthase-1 (PKS-1) from Cannabis sativa (Taguchi et al., pp. 217–220); the MtxX protein from Methanococcus jannaschii (Dong Hae Shin, pp. 300–303); and full-length yeast tropomyosin 2 from Saccharomyces cerevisiae (Meshcheryakov et al., pp. 528–530). If authors submitting this year feel a crystal image they publish could contribute to the crystals cover in 2010, they should alert the Technical Editor by e-mail. Selection factors include focus, contrast, color and symmetry, but those chosen for the final assembly must be complementary. Acta Crystallographica Section F Structural Biology and Crystallization Communications