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In this week's PNAS Early Edition, the University of Alberta's Ling-ju Lin and Michael Schultz discuss promoter-targeted Rtt109 repression of ARG1 via "silencing a pathway of transcriptional activation that depends on ASF1." Lin and Schultz show that the intensity of ARG1 transcription "at its induced and repressed set points is controlled by different mechanisms of functional interplay between Rtt109 and Asf1."

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President Donald Trump might not approve the stricter standards the US Food and Drug Administration is developing for authorizing a SARS-CoV-2 vaccine, according to Politico.

Wired reports that Oxitec has now developed a genetically modified fall armyworm.

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