Intracellular single-chain antibody directed against erbB2 down-regulates cell surface erbB2 and exhibits a selective anti-proliferative effect in erbB2 overexpressing cancer cell lines. - Deshane,J.; Loechel,F.; Conry,R.M.; Siegal,G.P.; King,C.R.; Curiel,D.T. (Gene Therapy, 1994)