摘要：

A method of selecting proteinaceous substances produced by recombinant DNA technique which mimic an arbitrary growth-inducing molecule is disclosed. Also disclosed is a method of selecting cells which produce proteinaceous substances which mimic an arbitrary growth-inducing molecule. A process for selecting synthetic genes which codes for a proteinaceous substance which mimics a growth-inducing molecule is also provided. The proteinaceous substances produced by this method are believed to be useful as novel drugs, vaccines, diagnostic agents or similar purposes.

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