Key points are not available for this paper at this time.
A DNA aptamer structure is the basis of a molecular machine that can be instructed to grab or release the human blood-clotting factor α-thrombin, depending on the operator DNA sequence addressing it. In the picture the aptamer structure, which assumes a conformation characterized by two stacked guanine quadruplex structures, is linked to thrombin (gray ellipse).
Dittmer et al. (Wed,) studied this question.