RUNX2 and ocular melanoma: After co‐culture, the cell proliferation rate and ALP activity of 3:1 group were similar to those of 4:0 in OM, which was the positive control (Figure 5A,B), while the osteogenesis‐related genes RUNX2, ALP and protein expression in group 3:1 were higher than that of 4:0 (Figure 5C,D).