FIG 1.

Transaldolase (TAL) specific activities of strains used in this study. “ND” indicates that transaldolase activity was not detected, i.e., it was below our limit of detection (<0.01 U/mg cell extract protein). Cth, C. thermocellum; Tsac, T. saccharolyticum. The “+” signs indicate the presence of a genetic feature, and the “Δ” sign indicates that a gene is deleted. Strain LL1004 is WT C. thermocellum and is a negative control for TAL activity. Strain LL1025 is WT T. saccharolyticum and is a positive control for TAL activity. Error bars represent 1 standard deviation (n ≥ 3).