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The 6,6‐quinolone scaffold of the viridicatin‐type of fungal alkaloids are found in various quinolone alkaloids which often exhibit useful biological activities. Thus, it is of interest to identify viridicatin‐forming enzymes and understand how such alkaloids are biosynthesized. Here an Aspergillal gene cluster responsible for the biosynthesis of 4′‐methoxyviridicatin was identified. Detailed in vitro...
Leicht gemacht: Das neue Reagens „ImIm“, das in situ in Wasser gebildet wird, aktiviert Nucleosid‐5′‐phosphate zu Imidazoliden, die anschließend mit Zucker‐1‐phosphaten gekuppelt werden können. Diese einfache Methode führt zu einer Rohproduktmischung, die sich direkt als Donorquelle für Glycosyltransferase‐vermittelte Oligosaccharidsynthesen eignet. Im Schema steht B für die Nucleobasen U, A oder...
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