?cl15430: Nucleoside_tran Superfamily (this model, PSSM-Id:417711 is obsolete and has been replaced by 472807)
Nucleoside transporter This is a family of nucleoside transporters. In mammalian cells nucleoside transporters transport nucleoside across the plasma membrane and are essential for nucleotide synthesis via the salvage pathways for cells that lack their own de novo synthesis pathways. Also in this family is mouse and human nucleolar protein HNP36, a protein of unknown function; although it has been hypothesized to be a plasma membrane nucleoside transporter.
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