TABLE 1.

¹⁵N and ¹H chemical shifts (ppm) of the backbone amide region of U-¹⁵N-enriched synthetic elastin at 37, 21, and 5 °C

These values are extracted from the DP and rINEPT-HETCOR spectra of Figs. 1 and 2. 1D and 2D, one-dimensional and two-dimensional.

Temperature	Gly NH				NH (except for Gly NH)			Pro N
	Peak 1	Peak 2	Peak 3	Peak 4	Peak 5	Peak 6	Peak 7
37 °C
1D, 15N		107.6a		110.7	117.6	119.4	121.9	133.7	135.7	138.2
2D, 15N	106.3b	107.3	107.9	110.6	117.4	119.3	122.1
2D, 1H	8.20b	8.13	8.31	8.40	7.80	7.92	7.97
21 °C
2D, 15N	106.7b	107.3	108.2	111.2	117.8	120.1	122.2
2D, 1H	8.26b	8.15	8.33	8.46	7.84	8.02	7.95
5 °C
1D, 15N	107.8a		108.5a	111.8	118.5	120.5	122.5	134.3	136.3	139.2
2D, 15N	107.3	107.5	108.5	111.7	118.4	120.3	122.5
2D, 1H	8.35	8.19	8.48	8.54	7.95	8.09	8.11

^a Peaks 1–3 were not well resolved on a one-dimensional spectrum.

^b The top of the peak was not apparent on a two-dimensional spectrum.