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Three distinct regions in the Sre1-CTD required for Scp1 binding, Sre1-CTD dimerization and tetrameric formation. The simplified cartoon highlights the three distinct surface areas of Sre1-CTD for homo- and heterotypic interactions. (I) the dimer interface, (II) the interface between dimers, (III) the interface with Scp1-WD40. The green and blue colors of the two protomers in each Sre1-CTD are for visual clarity only.
