Fitted curves for the specific productivity of trehalose obtained from batch cultures of C. glutamicum strains in DMCG II supplemented with 1 mM IPTG. (A) ⋄, C. glutamicum 13032; ▪, C. glutamicum pJCtreY; ○, C. glutamicum pJCtreZ; ▵, C. glutamicum pJCtreYZ. (B) ⋄, C. glutamicum 13032; ▴, C. glutamicum pJCgalUtreY; □, C. glutamicum pJCgalUtreYZ.