Coimmunoprecipitation of three KIF5s with each of the anti-KIF5 antibodies. Mouse brain crude extracts were immunoprecipitated separately by anti-KIF5 antibodies or normal rabbit IgG (Anti-5A, Anti-5B,Anti-5C, and Rab IgG, respectively) and then blotted with each of the anti-KIF5 antibodies (5A,5B, and 5C, respectively). The sample precipitated by antibodies directed against one KIF5 also included the other KIF5s. The control normal rabbit IgG did not precipitate any KIF5.