Table 2-8. COMPARISON OF HORMONAL ASSAY SYSTEMS (versus RIA)
Assay Binding Component Advantage Disadvantage(s)
Bioassay innate receptor biological lacks practicality, precision, and sensitivity
Protein-binding nonimmune carrier no immunization lacks specificity
RRA isolated receptor biological lacks practicality
EIA antibody no radioactivity lacks sensitivity, must add substrate
SPA antibody, receptor no separation step patented technology
IRMA antibody short incubation requires two antibodies
ELISA antibody no radioactivity same as EIA and IMRA (sandwich)