Methods for transporting vitamin C transporter and related methods

A method of transporting vitamin C across a membrane, the method comprising the steps of:

• a. causing expression of a protein encoded by a nucleic acid comprising SEQ ID NO:
• 2, or substitutions or modifications thereof, wherein the substituted protein transports vitamin C across membranes;
• b. causing integration of the protein within a membrane;
• and
• c. contacting the membrane, under conditions favoring vitamin C transport, with vitamin C, thereby resulting in transmembrane transport of vitamin C.