Final answer:
The technique to track single molecules using gold-linked antibodies is known as the Video tracking method, providing real-time visualization under a microscope.
Step-by-step explanation:
The method to follow the movement of a single molecule or a small group of molecules using antibodies linked to small particles of gold is called Video tracking method. This advanced approach leverages the specificity of antibodies to recognize and bind to specific antigens, or epitopes, on the molecules being tracked. By linking these antibodies to gold particles, researchers can visually monitor the movement of these molecules using video-enhanced microscopy techniques.
The process begins by attaching the antibody-gold particle conjugates to the targeted molecules. Once bound, the movement of these labeled molecules can be tracked in real-time under a microscope equipped with video capabilities. The gold particles serve as a visual marker, reflecting light in such a way that they can be easily seen against the backdrop of the biological sample. The video tracking method provides a direct view of molecular dynamics and interactions in live cells, offering insights into biological processes at the molecular level.