Cyclo(Pro-Ala)
Cyclo(Pro-Ala) is a new cell cycle inhibitor.
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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.
Need more advice on solubility, usage and handling? Please email to: service@chemfaces.com
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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Journal of Shenyang Pharmaceutical University, 2015(2):107 -10.
Cyclic dipeptides as new cell cycle inhibitors produced by Streptomyces flavoretus [Reference:
WebLink]
To find the cell cycle inhibitors from the metabolites of Streptomyces flavoretus 18522.
METHODS AND RESULTS:
Activity-guided isolation was performed on the chloroform extract of the fermentation broth and mycelia of Streptomyces flavoretus 18522 by using ts FT210 cells.Compounds were isolated through various chromatoghraphic methods and elucidated by spectroscopic means.The flow cytometry was used to evaluate the cell cycle inhibiting activity of the fractions and compounds. Six cyclic dipeptides were obtained and identified as cyclo(Ala-Leu)(1),cyclo(Ala-Ile)(2),cyclo(Ala-Val)(3),cyclo(Phe-Leu)(4),Cyclo(Pro-Ala)(5) and cyclo(Phe-Val)(6).
CONCLUSIONS:
Compounds 1-6 are reported as new cell cycle inhibitors for the first time.
Int J Pept Protein Res. 1985 Nov;26(5):518-27.
Theoretical pi-pi* absorption and circular dichroic spectra of cyclic dipeptides.[Pubmed:
4086166]
METHODS AND RESULTS:
The dipole interaction model, treated by the partially dispersive normal mode method, is used to calculate circular dichroic spectra of cyclo(Gly-Gly), cyclo (Ala-Gly), cyclo(Ala-Ala), cyclo(Pro-Gly), Cyclo(Pro-Ala), cyclo(Pro-Val), cyclo (Pro-D-Val), and cyclo(Pro-Pro) in the amide pi-pi* absorption band near 190 nm. Assuming a standard backbone geometry, spectra which are in fair to good agreement with experiment are obtained for these molecules. The spectra are predicted to be sensitive to conformations of Pro and Val side chains. The effects of dipeptide ring folding on calculated CD spectra are mostly consistent with those found by other workers, except that it is found that a planar ring conformation of cyclo (Ala-Ala) and cyclo (Ala-Gly) gives predicted spectra comparable to experiment.
CONCLUSIONS:
The same model gives theoretical absorption spectra consistent with available experimental data.
