6alpha-Hydroxymedicarpin
Reference standards.
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Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to
24 months(2-8C).
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20C. Generally, these will be useable for up to two weeks. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.
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The packaging of the product may have turned upside down during transportation, resulting in the natural compounds adhering to the neck or cap of the vial. take the vial out of its packaging and gently shake to let the compounds fall to the bottom of the vial. for liquid products, centrifuge at 200-500 RPM to gather the liquid at the bottom of the vial. try to avoid loss or contamination during handling.
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Phytochemistry, 1982, 21(5):1023-1028.
Metabolism of the phytoalexins medicarpin and maackiain by Fusarium solani.[Reference:
WebLink]
METHODS AND RESULTS:
Non-inhibitory concentrations of the pterocarpan phytoalexin medicarpin were completely metabolized by isolates of Fusarium solani f. sp. pisi, f. sp. cucurbitae, f. sp. phaseoli and two other F. solani isolates genetically related to f. sp. pisi during 24 hr of growth in liquid medium. The major metabolic products accumulated without significant further degradation. Medicarpin was modified at one of three adjacent carbon atoms to form either an isoflavanone derivative, a 1a-hydroxydienone derivative or
6alpha-Hydroxymedicarpin. Whereas each isolate degraded medicarpin to one or more metabolises, the isolates varied as to which metabolise they produced. Maackiain, another pterocarpan phytoalexin, was also metabolized by all the isolates to products analogous to those formed from medicarpin.
CONCLUSIONS:
The ability to metabolize medicarpin and maackiain was not always associated with the ability to metabolize pisatin and phaseollin, two other pterocarpan phytoalexins that were degraded by several of the isolates. Tolerance of medicarpin and maackiain was similarly not always associated with tolerance to pisatin.
