Extended Data Fig. 7: Rat1 is incompatible with Pol II elongation factors.

a, Structural comparison between Pol II Rat1-PTTC1 and Pol II TEC (PDB:7XN7⁵⁵) shows the steric clash of Rat1 and Spt5 KOW1/2/3 domains. b, Structural comparison between Pol II Rat1-PTTC1 and Pol II TEC (PDB:7XN7⁵⁵) shows the steric clash of Rat1 and Spt6.