May play an important role in the cellular response to tissue hypoxia. May be either a GDP-fucose transporter that competes with SLC35C1 for GDP-fucose, or a factor that otherwise enhances the fucosylation of Notch and is required for optimal Notch signaling in mammalian cells. Ubiquitously expressed although the level of expression is tissue dependent. Overexpressed in ovarian cancer. In hypoxic trophoblast cells. Belongs to the TPT transporter family. SLC35C subfamily.