Radioactive tracers are substances labeled with a radioactive atom to allow easier detection and measurement. They have applications in many fields, but we will focus on their use in medicine.
An exciting new area of use combines radioactive tracers with monoclonal antibodies (MoAbs). Antibodies are proteins that interact with a foreign substance (antigen) in a specific way. Advances in genetic technology allow biochemists to make MoAbs for many specific substances. Characteristic compounds on the surfaces of cancer cells can act as antigens. When radionuclide-labelled MoAbs are injecte…
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