1. That chemical ( in the plant ) is a hapten , 2. The assay uses hapten -labelled nucleotides in a primer extension reaction. 3. Urushiol acts as a hapten , leading to a Type IV hypersensitive reaction. 4. A hapten is a small molecule that changes the structure of an antigenic epitope. 5. There are two models for this : the hapten model and the autoantibody model. 6. The vaccine consisted of a patient's own irradiated cancer cells blended with a common hapten . 7. A common example of a hapten is urushiol, which is the toxin found in poison ivy. 8. A well-known example of a hapten is urushiol, which is the toxin found in poison ivy. 9. A sulfhydryl-containing hapten can then be reacted with the KLH to complete the immunogen without causing polymerization. 10. SMCC or its water-soluble analog, Sulfo-SMCC, is commonly used to prepare antibody-hapten conjugates for antibody development.