(CD3e Molecule, epsilon Associated Protein (CD3EAP))
Isoform 2 has been described as a component of preformed T-cell receptor (TCR) complex. DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates. Component of RNA polymerase I which synthesizes ribosomal RNA precursors. Isoform 1 is involved in UBTF-activated transcription, presumably at a step following PIC formation.