GO:0005337

nucleoside transmembrane transporter activity

GO Category: 
molecular_function
Details: 
Catalysis of the transfer of a nucleoside, a nucleobase linked to either beta-D-ribofuranose (ribonucleoside) or 2-deoxy-beta-D-ribofuranose, (a deoxyribonucleotide) from one side of a membrane to the other.