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Screening of aptamer pairs for the detection of SARS-CoV-2 S1 protein. Each thiolated capture aptamer (AptxT) was analyzed in combination with each of the biotinylated reporter aptamers (AptxB) using a constant concentration of S1. No protein was added for the control samples. The number refers to the number of the aptamer tested, T indicates the thiolated aptamer and B indicates the biotinylated aptamer.
