Mitochondrial presequences are ____ charged amphipathic sequences retained in the ____ stage through association with ____ molecular chaperones.
A. negatively; folded; Hsp70
B. positively; unfolded; Hsp70
C. neutral; unfolded; Hsp40
D. negatively; prefolded; Hsp90
E. positively; folded; Hsp40
