Keywords: 293T; human embryonic kidney cells; BSA; bovine serum albumin; cDNA; complementary deoxyribonucleic acid; CEF; chicken embryo fibroblasts; Cyt.D; cytochalasin D; DAPI; 4â²,6-diamidino-2-phenylindole; DEF; duck embryo fibroblasts; DM; dissociation medium;