. "Catalysis of the transfer of nucleobases, nucleosides, nucleotides and nucleic acids from one side of a membrane to the other." . . "nucleobase-containing compound transmembrane transporter activity" . "nucleobase, nucleoside, nucleotide and nucleic acid transmembrane transporter activity" . . . . . . . . . . . . . . . . . . . . . . . . . . . .