Supplementary Figure 4: Structures of the PxL motif peptides.
From: A PxL motif promotes timely cell cycle substrate dephosphorylation by the Cdc14 phosphatase

The difference electron density maps calculated by omitting the PxL peptides, contoured at 3σ, are displayed for Cbk1 and Sic1-derived PxL motif peptides bound to each Cdc14 protomer in the three crystal structures.