Table 1.

The best-fit ¹⁵N CSA parameters for [¹⁵N]-N-acetyl-valine (NAV) extracted from the σ₁- and σ₂-CSA measurements performed with various RN_n^v symmetry sequences.

N	n	v	δσ (ppm)	ησ
6	1	2	105.1	0.23
8	1	3	105.7	0.21
10	1	3	106.2	0.18
10	1	4	105.8	0.19
12	1	4	108.9	0.18
12	1	5	106.5	0.17
14	2	3	104.9	0.21
14	2	5	105.4	0.20
18	2	5	105.3	0.19
Static NMR			107.2	0.19

¹Note: The MAS frequency was 10 kHz, and the rf field strength was 5N/n kHz for each RN_n^v symmetry sequence.