The microplate provided in this kit has been pre-coated with a monoclonal antibody specific to Parathyroid Hormone (PTH). A competitive inhibition reaction is launched between biotin labeled Parathyroid Hormone (PTH) and unlabeled Parathyroid Hormone (PTH) (Standards or samples) with the pre-coated antibody specific to Parathyroid Hormone (PTH). After incubation the unbound conjugate is washed off. Next, avidin conjugated to Horseradish Peroxidase (HRP) is added to each microplate well and incub