1.1.1.148 - 1.1.1.148 2 forms 1.1.1.148 8 forms, six of them purified to homogenity: IA, IB, IC, IIC, IID, III 1.1.1.148 partial 1.1.1.148 recombinant GST-fusion enzyme from Escherichia coli strain BL21(DE3) by glutathione affinity chromatography