The protein expression of PTEN was detected in three colorectal cancer cell lines with different metastasic ability by western blot.

• (2 )利用Westernblot法检测不同转移潜能的大肠癌细胞系内PTEN蛋白的表达水平 ,说明PTEN蛋白的表达对大肠癌细胞转移潜能的影响。