A biophysical analysis of the tetratricopeptide repeat-rich mitochondrial import receptor, Tom70, reveals an elongated monomer that is inherently flexible, unstable, and unfolds via a multistate pathway. - Beddoe T; Bushell SR; Perugini MA; Lithgow T; Mulhern TD; Bottomley SP; Rossjohn J (The Journal of biological chemistry, 2004)