摘要:
Two-cistronic Met-IGF-I expression vector, in which the first cistron encodes a protective peptide with a molecular weight of about 500-50,000 and the second cistron encodes IGF-I, was provided. Also provided is a process for preparing Met-IGF-I, which comprises transforming E. coli with said vector and growing the resultant transformant, followed by the lysis of the cell culture and isolation of Met-IGF-I.