TABLE 2.

Helical content (%)

	0% TFE	40% TFE
HCN4 αA′–αB′a	6%	46%
HCN4 αC′–αD′a	7%	66%

^a The peptide concentration was 0.1 mg/ml. The estimated percentage of helical structure was calculated from the [θ]₂₂₂ in Fig. 7, b and c.