The MLL1 trimeric catalytic complex is a dynamic conformational ensemble stabilized by multiple weak interactions.

Kaustov L, Lemak A, Wu H, Faini M, Fan L, Fang X, Zeng H, Duan S, Allali-Hassani A, Li F, Wei Y, Vedadi M, Aebersold R, Wang Y, Houliston S, Arrowsmith CH