S2.2 aptamer (sodium)

S2.2 aptamer sodium is a nucleic acid aptamer targeting the mucin MUC1 and can be used for targeted imaging of MCF-7 cancer cells. S2.2 aptamer sodium was labeled with Cy5, and when fluorescent silicon nanodots (SiND) were present, the fluorescence was quenched; when MUC1 was also present, the fluorescence was restored. S2.2 aptamer sodium detects MUC1 with a linear range of 3.33-250 nM[1].