Molecular Weight(MW): 277.34
K858 is a novel and potent inhibitor of Eg5 with an IC50 of 1.3 μM for inhibiting the ATPase activity of Eg5, showing at least 150-fold more selective for Eg5 than other members of the kinesin superfamily.
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Choose Selective Kinesin Inhibitors
|Description||K858 is a novel and potent inhibitor of Eg5 with an IC50 of 1.3 μM for inhibiting the ATPase activity of Eg5, showing at least 150-fold more selective for Eg5 than other members of the kinesin superfamily.|
K858 blocked centrosome separation, activated the spindle checkpoint, and induced mitotic arrest in cells accompanied by the formation of monopolar spindles. Long-term continuous treatment of cancer cells with K858 resulted in antiproliferative effects through the induction of mitotic cell death, and polyploidization followed by senescence. In contrast, treatment of nontransformed cells with K858 resulted in mitotic slippage without cell death, and cell cycle arrest in G1 phase in a tetraploid state. K858 has minimal effects on abnormalities in the number and structure of chromosomes. K858 has no effect on microtubule polymerization in cell-free and cell-based assays.
|In vivo||K858 exhibits potent antitumor activity in xenograft models of cancer, and induces the accumulation of mitotic cells with monopolar spindles in tumor tissues. K858 is not neurotoxic in a motor coordination test in mice.|
|In vitro||DMSO||55 mg/mL (198.31 mM)|
|Ethanol||4 mg/mL (14.42 mM)|
* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.
Calculate the mass, volume or concentration required for a solution. The Selleck molarity calculator is based on the following equation:
Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)
*When preparing stock solutions, please always use the batch-specific molecular weight of the product found on the via label and MSDS / COA (available on product pages).
Calculate the dilution required to prepare a stock solution. The Selleck dilution calculator is based on the following equation:
Concentration (start) x Volume (start) = Concentration (final) x Volume (final)
This equation is commonly abbreviated as: C1V1 = C2V2 ( Input Output )
* When preparing stock solutions always use the batch-specific molecular weight of the product found on the vial label and MSDS / COA (available online).
Molecular Weight Calculator
Enter the chemical formula of a compound to calculate its molar mass and elemental composition:
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Instructions to calculate molar mass (molecular weight) of a chemical compound:
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Definitions of molecular mass, molecular weight, molar mass and molar weight:
Molecular mass (molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). (1 u is equal to 1/12 the mass of one atom of carbon-12)
Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol.
Answers to questions you may have can be found in the inhibitor handling instructions. Topics include how to prepare stock solutions, how to store inhibitors, and issues that need special attention for cell-based assays and animal experiments.
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