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In Science this week, researchers from Harvard and the University of Toronto used a newly-constructed fluorescent protein fusion library for E. coli for a quantitative system-wide analysis of protein and mRNA expression in individual cells with single-molecule sensitivity. They found that protein and mRNA copy numbers for any given gene in a single cell are uncorrelated.

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The World Health Organization will be providing low-cost COVID-19 tests to low- and middle-income nations, according to Reuters.

Nature News examines how the confirmation of Amy Coney Barrett to the US Supreme Court could affect scientific agencies.

Nobel Prize-winner Arthur Ashkin, who developed optical tweezers, has died at 98, the Washington Post reports.

In PNAS this week: altered gene expression in brain samples from Alzheimer's disease patients, effects of gene mutations found in bladder cancer, and more.