This family of proteins plays a role in the formation and/or maintenance of lipid rafts [1].

1: The B cell-specific major raft protein, Raftlin, is necessary for the integrity of lipid raft and BCR signal transduction. Saeki K, Miura Y, Aki D, Kurosaki T, Yoshimura A; EMBO J. 2003;22:3015-3026. PMID:12805216