title: L-Arabinose is not a gratuitous inducer of alpha-galactosidase from Saccharomyces carlsbergensis.
abstract: L-Arabinose has been described as a gratuitous inducer of the yeast alpha-galactosidase. This has been found to be an artefact resulting from galactose contamination of commercial samples of L-arabinose. The inactivation produced on UDP-glucose 4-epimerase by the pentose does not amplify the inducer activity of contaminating D-galactose.
mesh_terms: D001089:Arabinose / Q000494:pharmacology*; D004790:Enzyme Induction; D005690:Galactose / Q000494:pharmacology; D005696:Galactosidases / Q000235:genetics*; D007700:Kinetics; D012440:Saccharomyces / Q000187:drug effects / Q000201:enzymology*; D000519:alpha-Galactosidase / Q000235:genetics*
chemical_list: D001089:Arabinose; D005696:Galactosidases; D000519:alpha-Galactosidase; D005690:Galactose