Fig. 5
From: New approaches to achieve high level enzyme production in Streptomyces lividans
Effect of the deletion of the repressor genes xlnR and bxlR on the production of SLAC controled by xysAp. SLAC activity normalized for biomass was determined in the wild type S. lividans 1326, ΔxlnR and ΔbxlR strains with DMPPDA as substrate as described in methods. Three independent transformants of each strain were analysed for SLAC activity in duplicate. Maximum biomass (determined as g/L) was reached around 48 h incubation and remained essentially unchanged up to 96 h