Wikipedia
MoRFs
Molecular Recognition Features (MoRFs) are small (10-70 residues) intrinsically disordered regions in proteins that undergo a disorder-to-order transition upon binding to their partners. MoRFs are implicated in protein-protein interactions, which serve as the initial step in molecular recognition. MoRFs are disordered prior binding to their partners, whereas they form a common 3D structure after interacting with their partners.