The protein encoded by this gene is a member of the transcription cyclin family. These cyclins may regulate transcription through their association with and activation of cyclin-dependent kinases (CDK) that phosphorylate the C-terminal domain (CTD) of the large subunit of RNA polymerase II. This gene product may play a dual role in regulating CDK and RNA polymerase II activities.
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Lim J, Hao T, Shaw C et al. (2006). "A protein-protein interaction network for human inherited ataxias and disorders of Purkinje cell degeneration". Cell125 (4): 801–14. doi:10.1016/j.cell.2006.03.032. PMID16713569.