Specificity of the kinase inhibitors for CLK1, CLK2, SRPK1, SRPK2, and SRPK3.

<p>CLK1, SRPK1, SRPK2, and SRPK3 assays were performed with 5 µM ATP, and the CLK2 assay was performed with 20 µM ATP. The definition and determination of the IC₅₀ values are described in the Methods.</p><p>Specificity of the kinase inhibitors for CLK1, CLK2, SRPK1, SRPK2, and SRPK3.