The Utilization of the Tartaric Acids by Pseudomonads

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Abstract
Pseudomonas strains, capable of attacking one or more isomers of tartaric acid were isolated from the soil by elective cultivation. Enzymic study showed that dehydration of tartaric acid to oxaloacetic acid was the most common pathway. In every case the attack was strictly inducible and in many strains the induced state was rapidly lost. This loss cannot be accounted for on the basis of loss of any known enzyme system and indicates that a specific additional inducible system is required to transport exogenous tartrate to the intracellular site. Inhibitory interactions between the isomers of tartaric acid, demonstrable with the cell-free dehydrase preparation, do not exist in vivo.

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