FIG. 3.
Sin4 and Pgd1 promote efficient PIC formation. Wild-type extract and Δpgd1 (A) or Δsin4 (B) extract were incubated with Gal4-VP16 activator and plasmid template in transcription mix for the indicated times. PIC formation was assayed by adding NTPs for a single 2.5-min round of transcription.