Mary Locke Petermann, American cellular biochemist (died 1975)

Mary Locke Petermann was an American cellular biochemist known for her key role in the discovery and characterization of animal ribosomes, the molecular complexes that carry out protein synthesis. She was the first woman to become a full professor at Cornell University's medical school.

February 25 is the 56th day of the year in the Gregorian calendar; 309 days remain until the end of the year.