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° |