Figure 6. Schematic diagram of recombinant bacterial strain construction and transformation results. (A-C) Schematic diagram of variant (W1, W2, and W3); (D-G) Schematic diagram of cascade system strains (S1, S2, S3,and S4); (H, I) Pmi LAADWT, variants (W1, W2 and W3) and strains (S1, S2, S3,and S4) conversion of representative amino acids to produce the corresponding α-keto acids.