The Binding Site, San Diego, has added a number of new monoclonal antibodies to be used in research and in vitro diagnostic manufacturing applications involving hepatitis B surface antigen (HBsAg). The monoclonal antibodies have been expressly designed for use as an integral component of solid-phase enzyme immunoassay procedures, especially enzyme-linked immunosorbent assays. Currently available monoclonals to HBsAg include those targeted toward HBsAg ‘a’ 15.12.3.17; HBsAg ‘a’ 25; HBsAg ‘a’ S1.9; HBsAg ‘a’ S2 A13; HBsAg ‘a’ S2 B3; HBsAg ‘a’ S3; HBsAg ‘a’ S2 7A; HBsAg ‘d’ AD1; and HBsAg ‘y’ AY1. The monoclonal antibodies are sourced from mice and manufactured to a purity level of > 95%. In addition, they are supplied preservative-free, demonstrate lot-to-lot consistency, and feature a shelf life of 4 years from the date of manufacture. For more information, visit the Binding Site.