1887

Abstract

Summary: 12 cannot grow on -arabitol, -arabitol, ribitol or xylitol ( Reiner, 1975 ). Using a mutant of 12 (strain 3; Sridhara ., 1969 ) that can grow on -1,2-propanediol, a second-stage mutant was isolated which can utilize -arabitol as sole source of carbon and energy for growth. -Arabitol is probably transported into the bacteria by the same system as that used for the transport of -1,2-propanediol. The second-stage mutant constitutively synthesizes a new dehydrogenase, which is not present in the parent strain 3. This enzyme, whose native substrate may be -galactose, apparently dehydrogenates -arabitol to -xylulose, and its structural gene is located at 68·5 ± 1 min on the genetic map. -Xylulose is subsequently catabolized by the enzymes of the -xylose metabolic pathway.

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/content/journal/micro/10.1099/00221287-94-2-246
1976-06-01
2022-01-25
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