Cyclin-dependent kinase 13 (CDK13)

Cyclin-dependent kinase which shows CTD kinase activity and is required for RNA splicing. Has CTD kinase activity by hyperphosphorylating the C-terminal heptapeptide repeat domain (CTD) of the largest RNA polymerase II subunit RPB1, thereby acting as a crucial regulator of transcription elongation.

Required for RNA splicing, likely by phosphorylating SRSF1/SF2. Required during hematopoiesis.