Fig. 3. Structural relatedness of the A- and B-domains of Cdc14B. (A) Comparison of structures of the A- and B-domains of Cdc14B and the phosphatase domain of PTEN. In the upper panel, the three domains are shown in the same orientation, and a stereoview of the A-domain (green) and B-domain (blue) superimposed is shown in the lower panel. (B) Structure-based sequence alignment of domains A and B of Cdc14B. Equivalent secondary structural elements are suffixed with ‘A’ and ‘B’ for domains A and B, respectively.