Lactoferrin(Lf) at 3 mu g/ml increased transfection about 3 fold with
cationic liposomes, which is a similar enhancing effect with transferr
in(Tf). However, the mechanism of enhancement by Lf was different from
that by Tf in that the concentration of Lf for the peak luciferase ac
tivity was 3 mu g/ml while that of Tf was 30 mu g/ml and furthermore,
when Lf and Tf were supplemented together in the liposome-DNA complex,
luciferase activity was increased additively.