| 摘要 |
A method is provided for producing hIGF-I with high purity and yield. This is a method for producing human insulin-like growth factor I, having a step of removing modified human insulin-like growth factor I from the human insulin-like growth factor I, the step including: (A) a step of adjusting the pH of a culture liquid of a human insulin-like growth factor I producing bacteria to 8 or more after completion of culture; (B) a step of letting the culture liquid obtained in step (A) stand; and (C) a step of removing the producing bacteria from the culture liquid obtained in step (B).
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