Table 2.

Average β-residue torsion angles (deg) for the 12- and the 14-helices

	12-helixa,e				14-helixa,e
	ACPC	dm-ACPC	β3-hPheb	overallc	ACHCd
φ	−100(15) [25]	−101(20) [9]	−93	−100(16) [35]	−141(13) [10]
ψ	−102(14) [25]	−101(14) [9]	−111	−102(14) [35]	−126(6) [9]
θ	94(11) [25]	96(11) [9]	87	94(10) [35]	57(3) [10]

^aThe number in brackets indicates number of measured and averaged distances.

^bOnly one set of torsion angles was used.

^cTorsion angle averages identified from ACPC, dm-ACPC and β³-hPhe residues.

^dReference ¹⁸; ACHC = (1S,2S)-2-aminocyclohexanecarboxylic acid.

^eFor heptamer 5 and the two ACHC homooligomers, only one independent molecule was used.