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Assay Method Information

Assay Name:  KHK Assay B
Description:  Compounds having an IC50 value less than 20 nM were examined in a second KHK assay, referred to as Assay B, using 10-fold less enzyme and measuring absorbance for 3 hours to obtain IC50 values below the 10 nM lower limit of Assay A. Compounds were prepared in DMSO as 4 μM stocks, diluted using an 11-point 2-fold dilution scheme on a Biomek FX spanning a concentration range of 97 μM to 100 nM, and incubated with reaction mixture prepared in a similar manner as in Assay A but containing 1 nM KHK-C. The reaction was initiated with addition of 0.2 mM ATP, and the absorbance was monitored for 3 hours at 340 nm. Reaction rates and IC50 values were calculated as described above.
Affinity data for this assay
 

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Last update November 1, 2007
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