Results Normal biological characteristics and cell function could be maintai ned in non-tumorigenic transformed cell, but it was changed markedly in maligna nt transformed cell.

• 结果一般转化细胞无致瘤性，大都能保持其正常细胞的生物学特性和功能，而恶性转化细胞其生物学特性和功能明显改变。