. 2022 Jun 3;20:129. doi: 10.1186/s12915-022-01310-6

Table 2.

Conformational chemical shifts for α-helices, β-strands, and PPII helices

	α-Helix	β-Strand	Gly-rich PPII helical bundle	Isolated Pro-rich PPII helix
δΔ ¹³Cα	3.1^a/2.9^b	− 1.5^a/ − 1.8 ^b	− 0.6^d	+ 0.6^e
δΔ ¹³Cβ	− 0.4^a/ − 0.8^b	+ 2.2^a/ + 2.7^b	+ 0.3^d	− 1.0^e
δΔ ¹³CO	2.2^c/2.2^b	− 2.2^c/ − 2.1^b	− 0.2^d	− 0.3^e

^aFrom Spera and Bax (1991) [34]

^bFrom Wang and Jardetzky (2002) [35] for alanine

^cCalculated from Wishart and Skyes (1994) [36]

^dFrom Treviño et al. (2018) [33]

^eThis study