haptenic

/hæpˈtɛnɪk/
adjective
  1. Relating to a small molecule that can trigger an immune response only when attached to a larger carrier molecule.
    • Haptenic substances are often used in experiments to test immune system responses.
    • The haptenic compound became immunogenic after binding to a protein.
    • Researchers studied the haptenic properties of the drug to understand allergic reactions.