Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
A, Schematic illustration of aptamer direct immobilization electrochemical sensor for capturing target proteins. B, Schematic illustration of peroxidase‐labeled aptamer sandwich electrochemical sensor for capturing tumor cells and converting into electrical signals. C, Schematic illustration of immobilization‐free aptasensor based on MB‐labeled dsDNA conformation
