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Melibiose
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
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Melibiose ist eine natΓΌrlich vorkommende organische Verbindung aus der Gruppe der Disaccharide. Es setzt sich ebenso wie Lactose aus Glucose und Galactose zusammen, die jedoch eine andere VerknΓΌpfung aufweisen, konkret eine (Ξ±1β6)-glycosidische Bindung. Somit ist es das Anomer von Allolactose.
Contents
β’ Einzelnachweise
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
Vorkommen und biologische Bedeutung
Melibiose kommt beispielsweise in Birkensaft vor.cite-ref-2[2] Sie entsteht neben Fructose bei der Hydrolyse von Raffinose, beispielsweise durch Mikroorganismen. Nicht alle Mikroorganismen verfΓΌgen auch ΓΌber Enzyme zum Spalten der Melibiose, was schon zur Unterscheidung von Hefe-Arten herangezogen wurde, da von den in der Lebensmittelproduktion hΓ€ufig eingesetzten Arten Saccharomyces cerevisiae keine Melibiose abbauen kann, Saccharomyces carlsbergensis jedoch dazu in der Lage ist.cite-ref-3[3] Menschen kΓΆnnen (Ξ±1β6)-verknΓΌpfte Saccharide nicht verdauen, sie werden jedoch von Darmbakterien metabolisiert.cite-ref-4[4]
Einzelnachweise
cite-note-sigma-11. Datenblatt Melibiose bei Sigma-Aldrich, abgerufen am 7. Juni 2025 (PDF).
cite-note-22. β S. Haq, G. A. Adams: OLIGOSACCHARIDES OF BIRCH SAP. In: Canadian Journal of Biochemistry and Physiology. Band 40, Nr. 8, 1. August 1962, S. 989β997, doi:10.1139/o62-111.
cite-note-44. β Kaarel Adamberg, Signe Adamberg, Karin Ernits, Anneli Larionova, Tiia Voor, Madis Jaagura, Triinu Visnapuu, Tiina AlamΓ€e: Composition and metabolism of fecal microbiota from normal and overweight children are differentially affected by melibiose, raffinose and raffinose-derived fructans. In: Anaerobe. Band 52, August 2018, S. 100β110, doi:10.1016/j.anaerobe.2018.06.009.