CEP-28122 is a highly potent and selective orally active ALK inhibitor.

ALK:1.9 ± 0.5 nM

Flashplate assay for identification and evaluation of Aurora inhibitors: On this assay 384-well Basic Flashplate? as solid assay platform is used. The plates are coated overnight at 4 °C with dithiothreitol (DTT) at 100 μg/mL in PBS buffer and used after being washed twice with PBS. 5 μL of CCT137690 in 2% DMSO is added to each well followed by 15 μL master mix of kinase buffer (50 mM Tris pH 7.5, 10 mM NaCl, 2.5 mM MgCl2, 1 mM myelin basic protein (MBP), 20 μM ATP, and 0.025 μCi/μL 33P-ATP). Finally, 250 ng per well of Aurora-A enzyme is added. The plate is shaken for approximately 2 min on a flat-bed plate shaker and incubated for 2 hours at room temperature. The reaction is stopped by washing the plate twice on a 16-pin wash with 10 mM sodium pyrophosphate. The plate is then read on a TopCount-NXTTM. For the determination of the inhibitory activity against Aurora-B or Aurora-C, the same conditions are followed in the assay using Aurora-B or Aurora-C enzymes.