Table 2. Geometrical parameters of detergent micelles.
| detergent | shape | ρ 1(e/Å3) | ρ 2(e/Å3) | a(Å) | b(Å) | t(Å) | a/b | Rgexpt (Å) | Rgmodel (Å) | Lexpt (Å) | Lmodel (Å) | Nexpt | Nmodel |
| FC10 (59 mM) | prolate | 0.273 | 0.490 | 20.4–20.9 | 13.3–13.6 | 2.7–3.0 | 1.52–1.55 | 25.9±0.2 | 24.2±0.5 | 27.6–28.2 | 29.3–30.2 | 39–45 | 50–56 |
| FC12 (77 mM) | prolate | 0.277 | 0.490 | 24.3–24.8 | 16.1–16.4 | 2.7–3.0 | 1.49–1.52 | 34.5±0.8 | 32.6±0.5 | 33.9–34.5 | 34.9–35.8 | 68–80 | 72–80 |
| FC14 (97 mM) | prolate | 0.280 | 0.490 | 29.6–30.1 | 18.8–19.1 | 2.7–3.0 | 1.57–1.60 | 50.2 a ±3.7 | 44.6±0.5 | 41.4–42.0 | 40.3–41.2 | 88–91 | 106–116 |
| OG (50 mM) | oblate | 0.268 | 0.540 | 10.6–11.4 | 20.6–21.4 | 2.9–3.5 | 0.51–0.55 | 29.6b ±2.2 | 23.5±0.5 | 26.9–27.5 | 24.1–26.3 | n.d.b | 70–90 |
| NG (50 mM) | oblate | 0.271 | 0.540 | 12.1–12.9 | 20.7–21.5 | 2.9–3.5 | 0.58–0.62 | 34.2b ±2.3 | 24.2±0.5 | 29.6–30.2 | 27.1–29.3 | n.d.b | 80–100 |
| DG (50 mM) | oblate | 0.273 | 0.540 | 13.5–14.3 | 22.6–23.4 | 2.9–3.5 | 0.60–0.64 | n.d.b | 27.5±0.5 | 32.1–32.7 | 29.9–32.1 | n.d.b | 100–120 |
| OM (56 mM) | oblate | 0.268 | 0.520 | 11.0–11.4 | 18.4–18.8 | 5.4–5.8 | 0.59–0.61 | 22.0±0.1 | 21.1±0.5 | 27.9–28.5 | 27.4–28.6 | 35–47 | 65–71 |
| DM (80 mM) | oblate | 0.273 | 0.520 | 13.4–13.8 | 22.7–23.1 | 5.4–5.8 | 0.59–0.61 | 26.2±0.1 | 25.6±0.5 | 33.4–34.0 | 32.2–33.4 | 86–103 | 98–104 |
| DDM (94 mM) | oblate | 0.277 | 0.520 | 15.7–16.1 | 27.9–28.3 | 5.4–5.8 | 0.56–0.58 | 31.8±0.1 | 30.7±0.5 | 39.4–40.0 | 36.8–38.0 | 135–149 | 145–155 |
| LMPG (16 mM) | oblate | 0.280 | 0.470 | 16.6–17.6 | 23.5–24.5 | 5.3–6.1 | 0.70–0.73 | 26.9±2.4 | 28.8±0.5 | 38.7–39.3 | 38.5–41.3 | 63–69 | 90–100 |
| LPPG21 (25 mM) | oblate | 0.281 | 0.470 | 19.0–20.0 | 28.4–29.4 | 5.3–6.1 | 0.67–0.70 | 35.7±2.5 | 34.5±0.5 | 45.2–45.8 | 43.3–46.1 | 160–170 | 140–150 |
a
For FC14, an average Rgexpt from the lower concentration data (≤150 mM) was used because deviation from linearity in the Guinier region was observed;
b
The Guinier regions for the glucosides are mostly nonlinear in the range that q*Rg<1.3, however estimations were made from lower concentration data where possible. In addition, the rise in intensity as q 0 precluded the determination of forward scattering intensities and thus Nexpt could not be determined.
Parameters were obtained from optimal core-shell ellipsoid model fits to the experimental SAXS data at given total concentrations of detergent in solution.