This is a family of unknown function found in chordata. Family members contain a transmembrane region in the C-terminal and have been shown to be localized to the Golgi apparatus [1].

1: C11ORF24 is a novel type I membrane protein that cycles between the Golgi apparatus and the plasma membrane in Rab6-positive vesicles. Fraisier V, Kasri A, Miserey-Lenkei S, Sibarita JB, Nair D, Mayeux A, Bardin S, Toyoda Y, Poser I, Poznyakovskiy A, Goud B, Hyman AA, Dimitrov A; PLoS One. 2013;8:e82223. PMID:24312644