The Eagle Biosciences Human anti-β2-adrenergic receptor antibody EIA is an antibody screening test. β2-adrenergic receptors have been pre-coated onto a microtiter plate. During the first incubation the anti-β2-adrenergic-receptor-antibodies of the samples are immobilized on the plate. The auto-antibodies are detected with a POD labeled anti-human IgG antibody. In the following enzymatic substrate reaction the intensity of the color correlates with the concentration and/ or avidity of anti-β2-adrenergic-receptor-antibodies. Sample Types: serum, plasma. Range: 2.5 - 40 U/ml. Sensitivity: 2.5 U/mL. Time: 3.5 hours ? Introduction The β1-adrenergic receptor is a G protein-coupled receptor. β receptors have the subtypes β1, β2 and β3. Agonist binding causes a rise in the intracellular concentration of the second messenger The β-2 adrenergic receptor is a G protein-coupled receptor. β receptors have the subtypes β1, β2 and β3. Agonist binding causes a rise in the intracellular concentration of the second messenger cAMP. The Eagle Biosciences Human anti-β2-adrenergic receptor antibody EIA is designed for the determination of antibodies (IgG) against the β2-adrenergic receptor in serum and plasma.