Enzyme action movie shows how nature makes penicillins

Scientists who specialize in studying the atom-by-atom choreography of enzymes have revealed new insights into the function of isopenicillin N synthase, an enzyme needed to produce some of the world's most critical antibiotics.

Florida mayor urges water limits because of COVID-19 surge

The mayor of the Florida city of Orlando asked residents on Friday to stop watering their lawns and washing their cars immediately, saying water usage needed to be cut back because of the recent surge of COVID-19 hospitalizations.

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