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Fond du Lac snowmobile crash; man struck tree, thrown from vehicle

A 69-year-old Fond du Lac man suffered serious but non-life-threatening injuries after he crashed his snowmobile into a tree ...
Nature

The lactose operon of Escherichia coli.

The genes lacZ, lacY and lacA are transcribed from a single promoter (P) that produces a single mRNA from which the three proteins are translated. The operon is regulated by Lac repressor, the product ...