The transcription and expression of hFL in the transfected COS 7 cells were assayed by RT PCR,ELISA and the experiment of the human umbilical blood CD34 + cell multiplication,respectively,at 72 hours after transfection.

• 脂质体介导法将其转染COS 7细胞 ,72h以RT PCR检测转染细胞中外源hFL基因的转录、ELISA法及脐血CD34 + 细胞增殖实验测定转染细胞上清中hFL的含量和活性。