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In PLoS Genetics this week, researchers at the Gregor Mendel Institute of Molecular Plant Biology and their colleagues report their "analysis of chromatin structure and RNA transcription at chromosome termini in Arabidopsis." They found telomeric repeat-containing transcripts, some of which "are processed into small interfering RNAs." Telomeric siRNAs promote methylation of asymmetric cytosines in telomeric repeats, contributing to telomeric chromatin maintenance,

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Politico notes that the Biden Administration has not yet nominated a permanent Food and Drug Administration commissioner. 

Anthony Fauci also informed the World Health Organization executive board that the US would be joining the COVAX initiative, according to CNBC.

A new preprint suggests some SARS-CoV-2 variants could affect the effectiveness of current vaccines, the Associated Press reports.

In Nature this week: Australian lungfish provides details on the movement of vertebrate life from water to land, and more.