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In an article published online in advance in Science this week, Emily Balskus and Christopher Walsh at Harvard Medical School describe the "genetic and molecular basis for sunscreen biosynthesis in cyanobacteria." They show that a mycosporine-like amino acid biosynthetic gene cluster generates four enzymes in vitro. "In addition to clarifying the origin of the MAAs, these efforts have revealed two unprecedented enzymatic strategies for imine formation," Balskus and Walsh write.

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According to Science, the US National Academy of Sciences is poised to eject two members accused of sexual harassment.

A UK study on mixing SARS-CoV-2 vaccines is expanding to include vaccines developed by additional companies, according to the Guardian.

In Nucleic Acids Research this week: machine learning approach to detect DNA-bound proteins, CRISPR-based method for activating specific gene targets, and more.

The FDA and CDC call for a pause in administering Johnson & Johnson's SARS-CoV-2 vaccine while reports of rare blood clots are looked into, reports the Wall Street Journal.