Co-expression of five genes in E coli for L-phenylalanine in Brevibacterium flavum

Table 2 The relative specific enzymatic activities in E. coli P2392 harboring different constructs

Strain/plasmid	Relative enzymatic activities
	PpsA	PckA	DS
E coli P2392/pλPR	1	1	1
E coli P2392/pλPR-pps	5.2	1.0	1.8
E coli P2392/pλPR-pck	1.0	2.5	1.5
E coli P2392/pλPR-2p	3.1	2.3	2.1

When we looked at the enzymatic activities of DS in different transformants, we found that either single-gene expression or co-expression of ppsA and pckA genes could induce elevated expression of DS by 0.5 to 1.1-fold.