This Week in Science

In Science this week, a team led by Robert Martienssen from Cold Spring Harbor Laboratory and Institut de Biologie de l’École Normale Supérieure report on the discovery of how histone marks are preserved on heterochromatin in order to conserve parental gene expression programs in daughter cells. Using Arabidopsis, they showed that histone marks are kept intact by interactions between the enzyme ATXR5, which modifies histones, and a histone variant known as H3.1.

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A study appearing in PLOS One finds that shortened consent forms don't affect clinical trial participants' understanding of the study.

The National Security Agency monitored signal intelligences for signs of "nefarious" genetic engineering projects, Gizmodo reports.

In Nature this week: barley genome sequenced, method for genotyping and phasing short tandem repeats, and more.

Dog DNA testing finds that some purebreds might not truly be purebreds, Inside Edition reports.