ClustalW alignment of GPIbα, integrin, and dopamine receptor cytoplasmic tail sequences. The FLNa-binding site of GPIbα and integrin β7 from the crystal structures and the corresponding sites of other integrins and dopamine D2 and D3 receptors are boxed. Potential phosphorylation sites (Tyr, red; Thr and Ser, blue) of integrins are indicated. A putative PKC phosphorylation site in D2 and D3 receptors are marked in yellow.