Regulatory component of the cyclin-L-CDK11 complex that regulates transcription and pre-mRNA splicing (PubMed:18216018, PubMed:36104565, PubMed:38059508). {ECO:0000269|PubMed:18216018, ECO:0000269|PubMed:36104565, ECO:0000269|PubMed:38059508}. This is the function of CCNL2 (cyclin L2, ENSG00000221978).