Abstract
Given that a split aptamer provides a chance for the development of a sandwich assay for targets with only one aptamer, it has received extensive attention in biosensing. However, due to the lack of binding mechanisms and reliable methods, there were still a few split aptamers that bind to proteins. In this work, cardiac biomarker myoglobin (Myo) was selected as a model, a new strategy of engineering split aptamers was explored with atomic force spectroscopy (AFM), and split aptamers against target protein could be achieved by choosing the optimal binding probability between split aptamers and target. Then, the obtained split aptamers were designed for Myo detection based on dynamic light scattering (DLS). The results demonstrated that the obtained split aptamers could be used to detect targets in human serum. The strategy of engineering split aptamers has the advantages of being intuitive and reliable and could be a general strategy for obtaining split aptamers.
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