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In a paper published online in advance in Science this week, the University of Texas at Austin's Jae Bok Heo and Sibum Sung show that the long intronic non-coding RNA COLDAIR is a critical component for the vernalization-mediated epigenetic repression of the floral repressor FLC in Arabidopsis. COLDAIR, Heo and Sung write, "is required for establishing stable repressive chromatin at FLC through its interaction with [polycomb repressive complex 2]."

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SARS-CoV-2 vaccine developers are evaluating further vaccine doses as well as modified doses to keep up with new viral variants, according to CNN.

The New York Times reports that a new viral variant of concern has been identified in New York City.

In Nature this week: spatiotemporally resolved map of the human cell cycle, folding single-cell RNA sequencing into cancer drug studies, and more.

CNN reports that a US Food and Drug Administration document says Johnson & Johnson's SARS-CoV-2 vaccine meets the requirements to receive an Emergency Use Authorization.