Jinbin and Chunyee Mai have listed for sale a four-bedroom, 2.5-bath home at 13451 Maple Ridge Court in Chesterfield for $499,900.

The Mais acquired the property for $355,000 in Feb. 1999. The 3,452-square-foot house in the North of 64 neighborhood was built in 1983. Yung Chu Chieng of Ark Realty is the listing agent for the home.

Mr. Mai has been a chief scientist at Martek Biosciences Corp., a company that develops nutritional products. It was established in 1985. He has served as the vice president of manufacturing at DSM and at Solae.

He attended Cornell University.

According to BlockShopper.com, there have been 823 home sales in Chesterfield during the past 12 months, with a median price of $330,000.

Address: 13451 Maple Ridge Court