Fig. 4From: Efficient expression of fusion human epidermal growth factor in tobacco chloroplastsBiological activity of GFP-EGF. Cell viability (A) and the phosphorylation of EGFR (B) in A549 cells treated by GFP-EGF. Wt, treatments with TSP of wild-type plant; PBS, the blank treatments; EGF, treatments of standard EGF; GFP-EGF treatments with TSP of transplastomic plant. **, ##, p < 0.05, compared to wt and PBS respectivelyBack to article page