cyclin/CDK positive transcription elongation factor complex P-TEFb complex 2009-06-03T03:12:56Z A dimeric positive transcription elongation factor complex b that comprises a cyclin-dependent kinase containing the catalytic subunit, Cdk9, and a regulatory subunit, cyclin T. Bur1/Bur2 complex GO:0070691 Sgv1/Bur2 complex cellular_component dimeric positive transcription elongation factor complex b go.owl midori pro.owl