(a)
(b)

Figure 4: The invasion effect of NK-lysin on SMMC-7721 cells. Cells on the lower surface were fixed with cold methanol and stained with 0.4% crystal violet (a). (A): Nontreated control group, (B): PBS group, (C): 10 μg/mL NK-lysin group, (D): 20 μg/mL NK-lysin group, and (E): 40 μg/mL NK-lysin group. The analysis of invasion inhibition rate of the different NK-lysin concentrations (b). The invasion inhibition rate of the NK-lysin group significantly differed from the PBS group. The values are presented as the mean ± SEM (n=3), P<0.01, P<0.001 vs. the PBS group.