Pentose metabolism in Mycobacterium smegmatis: specificity of induction of pentose isomerases

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Abstract
The induction of D-xylose, D-ribose, L-arabinose, and D-lyxose isomerases by various sugars was studied to determine the configuration necessary for induction. D-Xylose isomerase was only induced by D-xylose, but D-ribose isomerase was induced by D-ribose, L-rhamnose and L-lyxose. L-Arabinose isomerase was induced by L-arabinose, D-galactose, L-arabitol, D-fucose and dulcitol, but D-lyxose isomerase was induced by D-lyxose, D-mannose, D-ribose, dulcitol and myoinositol. Some compounds such as dulcitol, D-galactose, and D- or L-fucose which do not support growth are still able to serve as inducers for various pentose isomerases.