Fig. 4From: Efficient expression of sortase A from Staphylococcus aureus in Escherichia coli and its enzymatic characterizationsThe response 3D surface plots of three significant factors. a Glycerol with tryptone; b glycerol with yeast extract; c Tryptone with yeast extract. The response 3D surface plots were obtained using the Design Expert 7.0 software directlyBack to article page