Abstract
Aptamers are functional nucleic acids possessing high affinity and specificity to their cognate ligands and are isolated from a library of nucleic acids by iterative rounds of selection and amplification. In the current study, we used surface plasmon resonance (Biacore) as an efficient methodology for selecting aptamers that bind to hemagglutinin (HA) of human influenza virus. This procedure allowed us to monitor and select the target-bound aptamers specifically and simultaneously. These studies not only yielded an aptamer that binds to the HA of influenza virus with high affinity but also revealed the consensus sequence, 5′-GUCGNCNU(N) 2–3GUA-3, for HA recognition.
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