Table 2. Reproducibility of crystal formation.
Protein | Number of replicates | Mean±standard deviation per protein/nucleant combination |
Lysozyme | 96 | 9.4±1.4 |
Pepsin | 96 | 9.2±1.3 |
Trypsin | 96 | 9.2±1.9 |
Glucose isomerase | 96 | 8.6±1.2 |
RNase A | 96 | 8.6±1.6 |
Myoglobin | 96 | 8.9±1.4 |
α-Lactalbumin | 96 | 9.4±1.4 |
Catalase | 96 | 9.2±1.3 |
Xylanase | 96 | 9.2±1.3 |
Thaumatin | 96 | 9.2±1.3 |
Nucleant | ||
Fumed silica | 96 | 8.1±1.1 |
CM Sephadex | 36 | 7.7±0.6 |
Sand | - | - |
Titanium(IV) oxide | 48 | 6.7±0.5 |
Glass wool | - | - |
Hydroxyapatite | 168 | 9.2±1.1 |
Cellulose | 168 | 9.3±1.0 |
Horse hair | 204 | 9.9±1.6 |
Dried seaweed | 228 | 9.6±1.2 |
Overall | 864 | 9.1±1.4 |
“-”, not applicable. Mean and standard deviation were calculated using Microsoft Excel. Twelve replicates were set up for each protein/nucleant combination tested, therefore the maximum possible number for the mean per protein/nucleant combination is 12. The no-nucleant control experiment to test reproducibility produced no crystals in any of the drops (therefore the mean±standard deviation per protein/nucleant combination for the no-nucleant control is 0. 0±0.0 in all cases).