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This Week in Nature: Apr 19, 2007

In a news item, Nature reports on a PNAS paper that found more chimpanzee genes have been under positive selection than genes in humans.

An essay from John Doyle and Marie Csete looks at engineered and biological systems. The authors contend that not only should engineers learn from biologists, but biologists should learn from engineers as well.

Phil Zamore writes a news and views piece commenting on papers in Cell and Science on how organisms manage to produce and amplify small RNAs designed to silence transposons.

Two papers in this issue report on a key regulatory mechanism involved in cell division. One paper, published by a team of authors including Greg Hannon, Marc Kirschner, and Peter Sorger, describes anaphase initiation. The other, from Reddy et al. at Harvard Medical School, demonstrates the mechanism of checkpoint inactivation.


The Scan

Tens of Millions Saved

The Associated Press writes that vaccines against COVID-19 saved an estimated 20 million lives in their first year.

Supersized Bacterium

NPR reports that researchers have found and characterized a bacterium that is visible to the naked eye.

Also Subvariants

Moderna says its bivalent SARS-CoV-2 vaccine leads to a strong immune response against Omicron subvariants, the Wall Street Journal reports.

Science Papers Present Gene-Edited Mouse Models of Liver Cancer, Hürthle Cell Carcinoma Analysis

In Science this week: a collection of mouse models of primary liver cancer, and more.