Table 1.

Chemical shifts of the ¹³C_α and ¹³C_β resonances of cysteines in Salp15.

Salp15 Cysteine	13Cα (ppm)	13Cβ (ppm)	Redox State a
65	56.70	35.20	Oxidized
93	60.50	42.50	Oxidized
97	52.83	37.90	Oxidized
115	54.67	38.87	Oxidized
122	58.00	40.97	Oxidized
128	54.90	35.98	Oxidized
135	63.60	31.70	Reduced

^a Based on the statistical analysis of cysteine ¹³C chemical shifts in proteins [10], which yielded the following average and standard deviation values: ¹³C_α = 55.5 ± 2.5 ppm (oxidized Cys), ¹³C_α = 59.3 ± 3.2 ppm (reduced Cys), ¹³C_β = 40.7 ± 3.8 ppm (oxidized Cys), ¹³C_β = 28.4 ± 2.4 ppm (reduced Cys).