Alternative splicing in phosducin. a. Amino acid sequence of the protein. The spliced region was identified based on the homology with the human phosducin isoform b, also called phosducin-like orphan protein 1 (GenBank accession number NP_072098). b. Graphical representation of the spliced and interacting regions. c. Ribbon representation of the three-dimencional structure (PDB code 2TRC, chain p). Colouring as in Figure 2.