Recombinant plasmid for the expression of L-phenylalanine ammonia-lyase and transformed strain carrying same

摘要

A recombinant plasmid for the expression of phenylalanine ammonia-lyase (PAL) is constructed by incorporating therein a combined promoter comprising (a) the fusion promoter (the tac promoter) composed of the trp promoter minus 35 region and the lac UV-5 promoter minus l0 region and (b) the PL promoter of the lambda phage, the tac promoter and the PL promoter being connected so as to have the same directional property. This recombinant plasmid permits more efficient expression of PAL in Escherichia coli.