Abstract
d-Ribose was found to enter the cells ofRhodotorula gracilis by a mechanism resembling simple diffusion (proportionality between rate and concentration, no effect of inhibitors, of temperature, of other sugars) at concentrations from 0.001 to 10mm. With a lag of about 1 hour,d-ribose was oxidized and, with a lag of about 20 hours, it could serve as a growth substrate. The transport step appears to be rate-limiting for the subsequent metabolic processes. The oxidation was stimulated byd-xylose but unaffected byd-glucose.
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Dedicated to Academician Ivan Málek on the occasion of his 60th birthday
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Horák, J., Kotyk, A. Anomalous uptake ofd-ribose byRhodotorula gracilis . Folia Microbiol 14, 291–296 (1969). https://doi.org/10.1007/BF02872694
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DOI: https://doi.org/10.1007/BF02872694