用蛋白折叠液相色谱法(PFLC)对大肠杆菌表达的包涵体形式的重组人粒细胞集落刺激因子(rhG-CSF)进行了复性并同时纯化.用Cu2+-亚氨基二乙酸(IDA)Sepharose作为固定化金属离子亲和色谱的固定相.在低浓度脲存在下,以咪唑为洗脱剂,采用线性梯度洗脱rhG-CSF.该法仅通过一步PFLC分离,减少了复性过程中rhG-CSF的聚集,复性后的rhG-CSF的比活性为1.8×108 IU/mg,纯度为97%,质量回收率为32%.
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