since the phosphorylation of spermine-binding protein appears to be mediated by cyclic amp-independent protein kinase ( s ) whose activity in the prostate is under androgenic control , it is suggested that androgen-dependent modulation of the protein kinase ( s ) exerts a regulatory control ( via phosphorylation-dephosphorylation ) on the spermine-binding activity and stability of this protein in vivo .
C0033640
protein kinase
C0031715
phosphorylation