ChAPs (Chs5p-Arf1p-binding proteins) are required for the export of specialised cargo from the Golgi. They physically interact with Chs3, Chs5 and the small GTPase Arf1, and they form also interactions with each other [1].

1: Arf1p, Chs5p and the ChAPs are required for export of specialized cargo from the Golgi. Trautwein M, Schindler C, Gauss R, Dengjel J, Hartmann E, Spang A; EMBO J. 2006;25:943-954. PMID:16498409