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用 Ｈｉｎｄ Ⅲ和 Ｅｃｏ ＲⅠ双酶酶切经改造的 Ｐ Ｕ Ｃａ Ｆ Ｇ Ｆ质粒，获得了人酸性成纤维细胞生长因子（ｈａ Ｆ Ｇ Ｆ）基因，将该基因片段插入表达载体ｐｋｋ２２３３，筛选得到了重组质粒ｐｋｋｈａ Ｆ Ｇ Ｆ。加 Ｉ Ｐ Ｔ Ｇ 诱导该质粒转化的大肠杆菌 Ｊ Ｍ １０９ 表达，ｈａ Ｆ Ｇ Ｆ在发酵液中的表达水平约８０ｍ ｇ／ Ｌ。用肝素亲和层析的方法，获得了电泳纯ｈａ Ｆ Ｇ Ｆ样品。纯化过程中ｈａ Ｆ Ｇ Ｆ活力回收率为６５％ 。纯化ｈａ Ｆ Ｇ Ｆ样品的比活性为 Ｅ Ｄ５０ ４．６ｎｇ／ｍ ｌ，理化及生物活性分析与天然ｈａ Ｆ Ｇ Ｆ对照品完全一致。
Human HbF gene was digested with Hind Ⅲ and EcoRI double enzyme digestion, and inserted into the expression vector pkk2233 , Screened the recombinant plasmid pkk ha F G F. Expression of this plasmid-transformed E. coli J M 109 was induced by addition of IPTG and the expression level of ha F G F in the fermentation broth was about 80 m g / L. Using heparin affinity chromatography, electrophoretic pure ha F G F samples were obtained. The ha F G F activity recovery during the purification was 65%. The specific activity of the purified ha F G F sample was E D50 4.6 ng / ml, and the physico-chemical and bioassay analyzes were in good agreement with the native ha F G F control.