Structure of the S. cerevisiae Nup120 NTD. (A) Domain structure. Yellow, β propeller domain; blue, α-helical insertion in the 6D7A loop; green, α-helical domain; gray, α-helical region. The bar above the domain structure denotes the crystallized fragment. (B) Structure of the Nup120 NTD in ribbon representation, color-coded as in (A). A 90°-rotated view is shown on the right.