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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US News & World Report writes that genetic testing of lung tumors can help identify treatments for patients.

A team of researchers plans to sample Loch Ness for environmental DNA, according to Newsweek.

The New York Times writes about the appearance of mosaicism in healthy people.

In PNAS this week: insecticide resistance patterns Anopheles gambiae mosquito, transcriptome patterns in Pseudomonas aeruginosa during infection, and more.