Genomic data from 14 Jewish Diaspora communities are here compared with data from 69 Old World non-Jewish populations, to investigate the demographic history of the Jewish people. Analyses shed new light on relationships between communities, reveal unappreciated genetic substructure within the Middle East, and trace the origins of most Jewish Diaspora communities to the Levant.

Most animal embryos grow through cell accumulation in a posterior growth zone, but the underlying forces are unknown. It is now proposed that posterior elongation in chicken embryos is an emergent property that arises from graded cell motility in random directions (as opposed to directed movement). This occurs in response to signalling through the fibroblast growth factor.

The lysine residues of histone proteins can be acetylated or methylated, with important effects on gene expression. Until recently the protein modules that bind acetyl-lysine have been limited to bromodomains. However, the tandem plant homeodomain (PHD) finger of human DPF3b — which is involved in gene activation — has also been reported to bind to acetylated histones. Here, three-dimensional solution structures of DPF3b offer mechanistic insight into how this protein recognizes acetylation marks.