Abstract
DNA-encoded chemical library (DECL) synthesis must occur in aqueous media under conditions that preserve the integrity of the DNA encoding tag. While the identification of "DNA-compatible" reaction conditions is critical for the development of DECL designs that explore previously inaccessible chemical space, reports measuring such compatibility have been largely restricted to methods that do not faithfully capture the impact of reaction conditions on DNA fidelity in solution phase. Here we report a comprehensive methodology that uses soluble DNA substrates that exactly recapitulate DNA's exposure to the chemically reactive species of DECL synthesis. This approach includes the assessment of chemical fidelity (reaction yield and purity), encoding fidelity (ligation efficiency), and readability (DNA compatibility), revealing the fate of the DNA tag during DECL chemistry from a single platform.
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