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 (By similarity). Higher expression at embryo stage 7.5 dpc than 11-17 dpc. Belongs to the TPT transporter family. SLC35C subfamily.