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. 2011 Apr 20;100(8):2053–2062. doi: 10.1016/j.bpj.2011.02.015

Table 1.

Summary of second-order susceptibility ratios and the determined pitch-angles for the peptide and methylene group in native type I and II collagens

Collagen types χzzz/χzxx χxxz/χzxx Peptide pitch-angle θ(p) Methylene pitch-angle θ(m)
Type I collagen (entire area) 1.51 ± 0.04 0.62 ± 0.08 45.82° ± 0.46° 94.80° ± 0.97°
Type II collagen (entire area) 1.26 ± 0.11 0.39 ± 0.15 45.72° ± 1.17° 97.87° ± 1.79°
Type II collagen (region of well-aligned fibril; Fig. 8, green box) 1.23 ± 0.05 0.38 ± 0.14 45.99° ± 0.96° 97.94° ± 1.64°
Engineered type I collagen 1.54 ± 0.20 0.64 ± 0.19 45.05° ± 1.24° 94.47° ± 2.23°
Engineered type II collagen 1.23 ± 0.05 0.38 ± 0.14 46.04° ± 1.52° 98.10° ± 1.79°