Abstract: A specific blocking reagent, method of manufacture thereof and methods of use are provided. The blocking reagent uses the specific antibody structure recognized by the target, e.g., analyte, and any interfering substances, e.g., heterophile molecules. The blocking reagent is, however, an inactivated form of the target-specific antibody. Thus, the blocking reagent cannot bind the target because the target-binding regions have been inactivated. The blocking reagent can, however, block interfering substances such as heterophile molecules as these binding regions remain active. In this manner, the blocking reagent provides highly specific removal of interferents. The blocking reagent thus has broad applicability in immunoassays as well as enhanced delivery of therapeutic and/or diagnostic agents.

Abstract: Methods of preparing a boronate-antigen complex for immunization of animals, a monoclonal antibody specific for the same, an immunoassay method for detection of the complex and a method of calculating the amount of a target glycated protein within the sample useful in the diagnostic monitoring of diabetes are disclosed. An immunoassay kit based on this reagent is also disclosed.