casein kinase i , accounting for the whole casein kinase s activity of cytosol , also contains a phosphorylatable 31-kda protein ( p31 ) which is a substrate of casein kinase s , since its phosphorylation is insensitive to heparin , the heat-stable inhibitor and trifluoperazine , but it is prevented by beryllium .
C0108554
casein kinase i
C0054846
casein kinase