San Diego-based Abgent, a producer of biological research reagent products, has been acquired by Chinese firm Wuxi PharmaTech (Cayman) Inc.. Wuxi PharmaTech announced the acquisition last night. Financial terms of the buy were not disclosed. Wuxi PharmaTech said that Abgent is the worl'd largest manufacturers of antibody reagents for research use. Abgent was founded in 2001.