Figure 1From: Control of eukaryotic transcription elongationColocalization of (a) Spt5 and (b) Spt6 with Pol IIoser2 (Pol IIo phosphorylated on Ser2) on Drosophila polytene chromosomes. Spt5 and Spt6 are red, Pol IIoser2 is green and colocalization is shown as yellow. Polytene positions 74EF and 75B are indicated. Adapted with permission from [12].Back to article page