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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NPR reports that Turkish high school students will no longer study evolution.

Researchers report they sequenced and identified plant species in an "al fresco" laboratory.

An Australian team searches for genetic alterations linked to depression in hopes of developing personalized treatments, the Sydney Morning Herald reports.

In PNAS this week: host contributors to typhoid fever risk, effects of obesity-related variants near TMEM18, and more.