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An international team led by investigators at the Salk Institute for Biological Studies in La Jolla, Calif., shows that Imp — IGF-II messenger RNA binding protein — counteracts endogenous small interfering RNAs to stabilize self-renewal factor upd RNA in Drosophila testis. "However, similar to upd, Imp expression decreases in the hub cells of older males, which is due to the targeting of Imp by the heterochronic microRNA let-7," the team writes.

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A New Zealand minister says the country's genetic modification laws need to be re-examined to help combat climate change, the New Zealand Herald reports.

A new analysis finds some cancers receive more nonprofit dollars than others.

An Australian mother's conviction in the deaths of her children may be re-examined after finding that two of the children carried a cardiac arrhythmia-linked gene variant.

In Science this week: comparative analysis of sex differences in mammal gene expression, and more.