172479.fig.002a
(a)
172479.fig.002b
(b)
Figure 2: The effect of codon optimization on sTfR expression. (a) SDS-PAGE analysis for purified sTfR proteins. Lane 1, sTfR protein expressed with codon-optimized construct; lane 2, sTfR protein expressed with wild-type construct; M, protein marker. (b) Comparison of the protein expression levels with the different sTfR gene constructs.