Fig 6. Fluorescence microscopic images of aptamer binding to E coli ATCC 25922.

Bacterial cells were incubated with aptamers (400 nM) 5’-labeled with 6-FAM, and then fixed and adhered to poly-L-lysine-coated slides. A random oligonucleotide sequence was used as a nonspecific binding control. Scale bar, 4 μm.