RESULTS: Under the optical microscope, mouse embryonic fibroblasts were irregular, rapidly grew, passaged at 1:4.Following mitomycin C treatment, cells slowly adhered and could not proliferate.

• 结果：光镜下小鼠胚胎成纤维细胞呈不规则形，生长较快，传代比例为1:4，经丝裂霉素C处理后细胞贴壁较慢，失去分裂增殖能力。