Expression and FA production (using corn bran) of Streptomyces recombinant FAEs. (A) SDS-PAGE analysis of srR18, srTH2-18, and srTH2-18PG (lane 1, protein standard; lane 2, srR18; lane 3, srTH2-18; lane 4, srTH2-18PG). Proteins (10 μg) were loaded into each lane. (B) Production of FA by srR18, srTH2-18, and srTH2-18PG using corn bran as the substrate. Values represent the averages of data from three independent experiments. Error bars represent standard deviations.