Table 1. Crystal forms of ecIws155–198 .
| Crystal form | Form I | Form II | Form III | Form IV |
|---|---|---|---|---|
| Crystallization condition | 0.1 M sodium citrate pH 5.0, 20% PEG 4000, 8% 2-propanol | 0.1 M MES pH 6.6, 20% PEG 8000, 0.5% ethyl acetate | ||
| Space group | P21 | P2221 | P21 | P21 |
| Crystal system | Monoclinic | Orthorhombic | Monoclinic | Monoclinic |
| Unit-cell parameters | ||||
| a (Å) | 43.0 | 82.5 | 33.7 | 41.9 |
| b (Å) | 125.4 | 53.1 | 128.8 | 220.0 |
| c (Å) | 55.7 | 35.1 | 33.6 | 71.8 |
| β (°) | 91.7 | 90 | 101.2 | 102.4 |
| Molecules per ASU† | 4 | 1 | 2 | 8 |
| Matthews coefficient† (Å3 Da−1) | 2.25 | 2.30 | 2.14 | 2.42 |
| Solvent content (%) | 45.3 | 46.6 | 42.6 | 49.2 |
| Maximum diffraction (Å) | 2.00 | 2.20 | 2.30 | 2.50 |
†
The number of molecules per asymmetric unit was chosen as the most probable solution obtained from the analysis of Kantardjieff & Rupp (2003 ▶) and was used for calculation of the most probable Matthews coefficient.