On the fourth floor of the University of Florida cancer research building, the once-bustling laboratory overseen by professor Weihong Tan is in disarray. White lab coats are strewn over workbenches. Storage drums and boxes, including some marked with biohazard warnings, are scattered across the floor. A pink note stuck to a machine that makes copies of DNA samples indicates the device is broken.

No one is here on this weekday afternoon in February. On a shelf, wedged next to instruction manuals and binders of lab records, is a reminder of bygone glory: a group photo of Tan surrounded by more than two dozen smiling students and employees.

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