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. 2007 Oct 31;2(10):e1091. doi: 10.1371/journal.pone.0001091

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).