Fig. 1

Various concentrations of TMF and CAT do not damage the cell viability. A The basic structure of flavonoids. The capacity of radical scavenging of flavonoid tends to increase when it has the CAT structure in its B ring. B The structure of TMF. C The structure of CAT. D For the A549 cell line, TMF and CAT were treated at concentrations of 5 to 40 μM and 0.5 to 5 μM, respectively, and for the co-treatment, 5/0.25, 5/0.5, 10/0.25 and 10/0.5 μM of TMF/CAT was used. All the treatment groups, except the control group, contained the same amount of DMSO which was used to dissolve TMF and CAT. E For other types of cell lines, such as myoblast (C2C12) and fibroblasts (HDF, MRC-5), 10 and 0.5 μM for single treatment of TMF and CAT, respectively, was administered or 10/0.5 μM for co-treatment of TMF/CAT