Reagent complex for immunoassay.

摘要

Methods and a reagent complex suitable for attaching detectable signals to specific-binding reagents, the complex comprising a first unlabelled antibody, wherein the first antibody has free specific-binding affinity for an analyte or an analyte-specific binding reagent; and a second antibody having specific-binding affinity for an Fc region of the first antibody, the second antibody being bound to the Fc region to form the complex and being labelled with a detectable signal.