tuliposide a/tulipa

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Molecular diversity of tuliposide A-converting enzyme in the tulip.

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Tuliposide A-converting enzyme (TCEA) catalyzes the conversion of 6-tuliposide A to its lactonized aglycon, tulipalin A, in the tulip (Tulipa gesneriana). The TgTCEA gene, isolated previously from petals, was transcribed in all tulip tissues but not in the bulbs despite the presence of TCEA

One-Step Enzymatic Synthesis of 1-Tuliposide A Using Tuliposide-Converting Enzyme.

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6-Tuliposides A (6-PosA) and B (6-PosB) are major secondary metabolites in tulip (Tulipa gesneriana), having an acyl group at the C-6 position of D-glucose. They serve as precursors of the antimicrobial α-methylene-γ-butyrolactones tulipalins A (PaA) and B (PaB). The conversions of 6-PosA/6-PosB to

A novel lactone-forming carboxylesterase: molecular identification of a tuliposide A-converting enzyme in tulip.

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Tuliposides, the glucose esters of 4-hydroxy-2-methylenebutanoate and 3,4-dihydroxy-2-methylenebutanoate, are major secondary metabolites in tulip (Tulipa gesneriana). Their lactonized aglycons, tulipalins, function as defensive chemicals due to their biological activities. We recently found that

A synthesis of tulipalin A and B and the acylglucoside, tuliposide A, fungitoxic agents from Tulipa gesneriana. Carbon-13 nuclear magnetic resonance analysis of anomeric configuration in acylglucosides.

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Molecular identification of tuliposide B-converting enzyme: a lactone-forming carboxylesterase from the pollen of tulip.

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6-Tuliposides A (PosA) and B (PosB), which are the major secondary metabolites in tulip (Tulipa gesneriana), are enzymatically converted to the antimicrobial lactonized aglycons, tulipalins A (PaA) and B (PaB), respectively. We recently identified a PosA-converting enzyme (TCEA) as the first

The main constituents of Tulipa systola Stapf. roots and flowers; their antioxidant activities.

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People living on the mountains of the Kurdistan Region, Iraq make a large use of herbs in the local traditional medicine. Among them, Tulipa systola, which grows under and between rocks, is very popular as an anti-inflammatory remedy and pain-relief. The phytochemical study of an ethanolic extract

Isolation and quantification of tuliposides and tulipalins in tulips (Tulipa) by high-performance liquid chromatography.

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The content of tuliposides and tulipalins were determined in Tulipa species and cultivars by reversed-phase high-performance liquid chromatography (RP-HPLC), using a water:methanol gradient as mobile phase. The compounds were detected by a diode array detector employed at 208 nm. The investigation

Substrate specificity of tuliposide-converting enzyme, a unique non-ester-hydrolyzing carboxylesterase in tulip: Effects of the alcohol moiety of substrate on the enzyme activity.

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6-Tuliposides A (PosA) and B (PosB) are glucose esters accumulated in tulip (Tulipa gesneriana) as major defensive secondary metabolites. Pos-converting enzymes (TgTCEs), which we discovered previously from tulip, catalyze the conversion reactions of PosA and PosB to antimicrobial tulipalins A (PaA)

Isolation and identification of tuliposides D and F from tulip cultivars.

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6-Tuliposides A (6-PosA) and B (6-PosB) are major defensive secondary metabolites in tulip cultivars (Tulipa gesneriana), having an acyl group at the C-6 position of d-glucose. Although some wild tulip species produce 1,6-diacyl-glucose type of Pos (PosD and PosF), as well as 6-PosA/B, they have not

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