Table 3.

Expected decay strengths for PITHIRDS-CT ¹³C-¹³C dipolar recoupling experiments

Configuration	Schematic	Sample C	Sample D	Sample E
Open hinge, in-register parallel β-sheet		Strong decay	Strong decay	Weak decay
Open hinge, antiparallel β-sheet		Weak decay	Strong decay	Weak decay
Closed hinge, β-hairpin		Weak decay	Strong decay	Strong decay

Strong decay refers to an 80% or larger reduction of signal intensity after 60 ms of recoupling. Weak decay refers to a 20% or smaller reduction of signal intensity after 60 ms of recoupling. The underlined predictions are not consistent with our experimental results (Fig. 5A).