Jingnan Mao and her husband, Deshan Yang, bought a five-bedroom, four-bath home at 14718 Greenleaf Valley Dr. in Chesterfield from Marcie and Perry Pattiz for $340,000 on May 21.

The 3,067-square-foot house, which was built in 1979, is in the Greenleaf Estates subdivision.

Mao is a biostatistician at Washington University in St. Louis.

She earned her M.S. in epidemiology and biostatistics from the University of Illinois–Chicago School of Public Health.

Yang works in the department of radiation oncology of Washington University School of Medicine in St. Louis. Previously, he was with the department of electrical and computer engineering at the University of Wisconsin in Madison.

Mr. Pattiz is a senior project engineer at Sunline Brands, a candy and confectionery manufacturer.

There were 565 home sales in Chesterfield in 2008, with a median sales price of $318,000.

Address: 14718 Greenleaf Valley Drive
Buyer(s): Deshan Yang (Husband) and Jingnan Mao (Wife)
Seller(s): Perry Pattiz (Husband) and Marcie Pattiz (Wife)
Sale date: May. 21, 2009