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Thrombin-binding aptamers and DNA weave tile. (A) Apt A (also named HD1) with a 7-bp stem and -TT- linkers at the ends; (B) Apt B (also named HD22); (C) Apt P (also called NU172). The structure shown is a model due to the absence of a published crystal structure; (D) A two-helix weave tile (2HT) with the four ends numbered for aptamer positioning and assembly naming.
