Abstract

Thermal denaturation (Tm) data are easy to obtain; it is a technique that is used by both small labs and large‐scale industrial organizations. The link between ligand affinity (K D) and ΔTm is understood for reversible denaturation; however, there is a gap in our understanding of how to quantitatively interpret ΔTm for the many proteins that irreversibly denature. To better understand the origin, and extent of applicability, of a K D to ΔTm correlate, we define equations relating K D and ΔTm for irreversible protein unfolding, which we test with computational models and experimental data. These results suggest a general relationship exists between K D and ΔTm for irreversible denaturation.

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