2.4.1.4 - 2.4.1.4 cloned into an inducible expression system in Escherichia coli 2.4.1.4 codon-optimized and expressed in Escherichia coli BL21 (DE3) 2.4.1.4 DNA library construction and DNA sequence determination and analysis, expression of the His-tagged enzyme in Escherichia coli 2.4.1.4 expression in Escherichia coli 2.4.1.4 expression in Escherichia coli BL21(DE3) 2.4.1.4 expression in Eschetrichia coli 2.4.1.4 expression inn Escherichia coli 2.4.1.4 expression of GST-tagged ASase in Escherichia coli strain BL21 (DE3) 2.4.1.4 expression of GST-tagged DgAS