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Helicobacter pylori is associated with gastric disorders. In this study, the anti‐H. pylori capacity of natural products from “Winter Red” crabapple flowers were evaluated, including flavonoids, organic acids, terpenoids, and phenolic acids. Among these products, kaempferol showed the highest antibacterial capacity. Structure–activity relationship assays indicated that all hydroxyls contributed to...
κ‐Carrageenases belong to family 16 of glycoside hydrolases that degrade sulfated galactans in the red algae known as κ‐carrageenans. A novel κ‐carrageenase, named PLJ30, was cloned from Pseudoalteromonas carrageenovora ASY5. PLJ30 showed the highest activity at 45°C and pH 6.5. Its activity was impaired by most metal ions and reagents we tested. The ESI‐MS analysis of hydrolysates showed that the...
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