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The aptamer motifs used to design motif descriptors and screen pools: (a) neomycin B, (b) ATP, (c) chloramphenicol, (d) macugen, (e) streptomycin, (f) GTP. Yellow bases are conserved, blue bases are C or G and pink bases are A, C or G. All displayed base pairs are required by the motifs. For (a–e), variations in length at both paired and unpaired regions are allowed. Details of conserved and variable motif elements are provided in motif descriptors in Supplementary Data.
