Table 4.

Specific activities of arabitol dehydrogenase and mannitol dehydrogenase in cell extracts of C. glutamicum RES167 and the ΔatlR and ΔatlR-ΔmtlD strains grown in minimal medium containing different carbon sources or mixtures thereof

Strain	Mean sp act (U/mg) ± SDa
	AraDH					ManDH
	Glucose	Arabitol	Mannitol	Arabitol + mannitol	Glucose + arabitol	Glucose	Arabitol	Mannitol	Arabitol + mannitol
C. glutamicum RES167	0.01 ± 0.00	2.07 ± 0.45	NG	1.50 ± 0.56	1.22 ± 0.09	0.01 ± 0.01	1.19 ± 0.39	NG	0.87 ± 0.32
C. glutamicum ΔatlR	3.46 ± 0.46	NG	1.55 ± 0.22	2.08 ± 0.07	NG	2.24 ± 0.44	NG	0.97 ± 0.10	1.17 ± 0.06
C. glutamicum ΔatlR-ΔmtlD	<0.01	NG	NG	NG	NG	<0.01	NG	NG	NG

^aNG, not grown.