2.1.1.42 expression in Escherichia coli 2.1.1.42 OMT-15 and OMT-17 are expressed in Escherichia coli BL21(DE3) cells as glutathione S-transferase fusion proteins 2.1.1.42 overexpressed in Escherichia coli BL21 2.1.1.42 SOMT-9, DNA and amino acid sequence determination, expression of GST-tagged SOMT-9 in Escherichia coli