Li J, Chian RJ, Ay I, Celia SA, Kashi BB, Tamrazian E, Matthews JC, Remington MP, Pepinsky RB, Fishman PS, Brown RH, Francis JW. Recombinant GDNF: tetanus toxin fragment C fusion protein produced from insect cells. Biochem Biophys Res Commun. 2009 Jul 31; 385(3):380-4.