pmc
Cdk12, Cdk12 kinase, Cdk9, P-TEFb, T-loop, a CDK-activating kinase (CAK)
CTD, CTD peptides phosphorylated at Tyr1 (pY1-CTD[3]), Ser2 (pS2-CTD[3]), Thr4, Cdk12, Cdk12 (lane 3), Cdk12 kinase, Cdk12/CycK, Cdk9, Cdk9 (lane 5), Cdk9/CycT1, IIA, Pol IIA, RNA Pol II, RNA polymerase II (Pol II), T-loop, a CTD, polymerase
Ser, Ser-2, Ser-5, Ser-7, Thr-4, Thr-893, Tyr-1
57