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Table 2 Effect of PEG molecular weight on glucoamylase partitioning

From: Partitioning of thermostable glucoamylase in polyethyleneglycol/salt aqueous two-phase system

PEG molecular weight Phase volume ratio Specific activity (U/mg) Yield (%) Purification factor
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PEG 1000 0.96 15.06 ± 1.33 19.16 ± 0.92 61.68 ± 0.94 1.14 ± 0.02
PEG 2000 0.78 13.21 ± 0.43 21.38 ± 1.23 73.31 ± 1.69 1.28 ± 0.11
PEG 4000 0.72 10.82 ± 1.58 27.34 ± 0.51 82.48 ± 0.97 1.46 ± 0.09
PEG 6000 0.65 9.57 ± 1.02 21.87 ± 0.83 84.01 ± 1.24 1.31 ± 0.05
  1. Phase system 15 % (w/w) PEG 1000/2000/4000/6000 + 15 % (w/w) potassium phosphate