Bactera (Bacillus subtilis or Lactobacillus sp.) have levanses for use and production of levan. Levan is polysaccharide which may be present in the gastrointestinal tract as a prebiotic. I am curious if levan is carbon source for Saccharomyces cerevisiae and S. boulardii.
I don't know about Sacch. boulardii, but Sacch. cerevisiae produces a beta-fructofuranosidase (invertase) that is capable of hydrolyzing fructose units from the non-reducing ends of levan. Therefore, it is reasonable to assume that levan can act as a carbon source for yeast in that way.
Sacch. boulardii and Sacch. cerevisiae have many enzymes. It do sugar analysis as levanse
Thank you for your answers but we have not good method for levan detection. Greg, do you know if invertase activity is oxygen-dependent?
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