Label-free optical observation of disordered-to-ordered transitions in single intrinsically disordered proteins. - Zargarbashi, Saaman; Dominguez, Cyril; Peters, Matthew; Yousefi, Arman; Munday, Sharon; Wang, Yanhong; Chatterjee, Shreyasi; Hudson, Andrew J.; Gordon, Reuven; Mellor, Christopher J.; Xu, Lei; Rahmani, Mohsen; et al. (npj Biosensing, 2026)