Crystals on the cover 2015

This issue inaugurates the second decade of publication of Acta Crystallographica Section F and, in keeping with the custom of the last decade, the cover features an artful arrangement of the best photomicrograph images of crystals published in the journal in the previous year. The custom has served as an annual testament to the commitment of Acta Cryst. F to serve the community of scientists whose focus includes the production of crystalline samples for macromolecular crystal structure determination. The crystals featured are as follows: keto-deoxy-d-galactarate (KDG) dehydratase from Agrobacterium tumefaciens, Taberman et al., 2014 ▶; glucose-1-phosphate uridylyltransferase (GalU) from Erwinia amylovora, Toccafondi et al., 2014 ▶; human farnesyl pyrophosphate synthase complexed with risedronate, Yokoyama et al., 2014 ▶; Xaa-Pro dipeptidase from Xanthomonas campestris, Kumar et al., 2014 ▶; Imp3 in complex with an Mpp10 peptide involved in yeast ribosome biogenesis, Zheng & Ye, 2014 ▶; C-terminal domain of guanylate kinase-associated protein from Rattus nor­vegicus, Tong et al., 2014 ▶; virus-like particles from a piscine betanodavirus, Luo et al., 2014 ▶; FMN-bound and FMN-free forms of aromatic acid decarboxylase (CpsUbiX) from the psychrophilic bacterium Colwellia psychrerythraea 34 H, Do et al., 2014 ▶; XoGroEL chaperonin from Xanthomonas oryzae pv. oryzae, Tran et al., 2014 ▶; an artificial molten-globular-like triosephosphate isomerase protein of mixed phylogenetic origin, Goyal et al., 2014 ▶; great cormorant (Phalacrocorax carbo) haemoglobin, Jagadeesan et al., 2014 ▶; FliP, an integral membrane component of the bacterial flagellar type III protein-export apparatus, Fukumura et al., 2014 ▶; feast/famine regulatory protein (Rv2779c) from Mycobacterium tuberculosis H37Rv, Dey & Ramachandran, 2014 ▶; Gos1p, a yeast SNARE protein, Cheng et al., 2014 ▶; d-lactate dehydrogenase from Lactobacillus jensenii, Kim et al., 2014 ▶; YfcM: an important factor for EF-P hydroxylation, Kobayashi et al., 2014 ▶; a novel β-l-arabinofuranosidase (HypBA1) from Bifidobacterium longum, Zhu et al., 2014 ▶; a dye-decolourizing peroxidase from Dictyostelium discoideum, Rai et al., 2014 ▶; a Fic protein from Clostridium difficile, Welner et al., 2014 ▶; human IL-18 and its extracellular complexes, Kimura et al., 2014 ▶; a surface mutant of the middle domain of PB2 from human influenza A (H1N1) virus, Tsurumura et al., 2014 ▶; the (S)-3-hydroxybutyryl-CoA dehydrogenase PaaH1 from Ralstonia eutropha H16, Kim & Kim, 2014 ▶; the putative type VI secretion immunity protein Tli5 (PA5088) from Pseudomonas aeruginosa, Chen et al., 2014 ▶; and a fungal type III polyketide synthase that produces the csypyrones, Yang et al., 2014 ▶. As indicated in the Editorial in the December 2014 issue (Hunter & Weiss, 2014 ▶), this new decade also inaugurates a new regime for articles reporting macromolecular crystallizations. We hope that our authors will respond to the new challenges presented by the changes. We are convinced that the changes will encourage the generation of articles of higher scientific import and of greater general interest. With this cover, and with this month’s article in our continuing International Year of Crystallography series, we emphasize our commitment to continue publication of macromolecular crystallization articles and welcome those that meet the new standards.