First passage times vs. applied force for barrier I separating the
twisted to aligned state show qualitative differences in first passage
times, with ordering FN-III7 >
FN-III9 ≈ FN-III8 >
FN-III10. In contrast, first passage times are
approximately equivalent for barrier II separating the aligned state
from further unfolding. □, FN-III7;
▴, FN-III8; ◊, FN-III9;
■, FN-III10.