GO:0005354

Catalysis of the transfer of galactose from one side of the membrane to the other. D-galactose is widely distributed in combined form in plants, animals and microorganisms as a constituent of oligo- and polysaccharides; it also occurs in galactolipids and as its glucoside in lactose and melibiose. [GOC:ai, GOC:mtg_transport, ISBN:0815340729]