Mediates the transport of CDP-ribitol (By similarity). Does not exhibit CMP-sialic acid, UDP-galactose and UDP-N-acetylglucosamine transport activity (By similarity). CDP(out) + CDP-L-ribitol(in) = CDP(in) + CDP-L-ribitol(out) Found in a complex with SLC35A2 and SLC35A3. Expressed in the kidney, lung, testis, and prostate. Expressed in the brain by sets of neurons, such as the pyramidal cells of the cortex, the Purkinje cells of the cerebellum, and the motoneurons of the brainstem. Expressed at E15. Expression is maintained until postnatal day 10 and decreases in adults. Belongs to the nucleotide-sugar transporter family. SLC35A subfamily.