This Week in Science

In Science this week, a team led by scientists from the University of Washington report on the use of the genome-editing technology CRISPR to create genetic barcodes that can help track the linage of cells in a living organism. Called Genome Editing of Synthetic Target Arrays for Lineage Tracing, or GESTALT, the method introduces unique patterns of mutations into a distinct, short genetic sequence.

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The UK's Nuffield Council on Bioethics says genetically modifying human embryos could be morally permissible, according to the Guardian.

A new Nature Biotechnology paper reports that CRISPR-Cas9 gene editing can lead to large deletions or complex rearrangements that could be pathogenic.

The Wall Street Journal likens a prototype developed by Synthetic Genomics to a "biological fax machine."

In PNAS this week: strategy for reactivating Rett syndrome-linked MECP2, small molecules able to suppress Staphylococcus aureus virulence, and more.