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  • Title: Melibiose is hydrolyzed exocellularly by an inducible exo-alpha-galactosidase in Azotobacter vinelandii.
    Author: Wong TY.
    Journal: Appl Environ Microbiol; 1990 Jul; 56(7):2271-3. PubMed ID: 2167631.
    Abstract:
    Azotobacter vinelandii hydrolyzed melibiose exocellularly, leading to an accumulation of free glucose and galactose in the medium. This enzyme could also be induced by galactose, raffinose, and stachyose. The alpha-galactosidase activity could be detected quantitatively by using p-nitrophenyl-alpha-galactopyranoside as a substrate for intact cells. Chloramphenicol totally inhibited the induction of this enzyme. However, benzyl alcohol inhibited the secretion of this enzyme but did not inhibit the biosynthesis of the enzyme.
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