Expression of the Gene Encoding the Tetraploid of Carboxyl-terminal Peptide of β-hCG Containing Thirty-seven Amino Acid Residues in E. coli

Human chorionic conadotropin (hCG) is a glycoprotein secreted by the trophoblast during early pregnancy and plays an important role in the maintenance ofearly pregnancy"'. Immuno--contraception directed against hCG is an effective meanso f fertility regulation. The worldwide interests have centred on developing immunocontraceptive vaccines against hCG, such as the prototype anti--hCG vaccine, advanced prototype anti--hCG vaccine, optimized anti--hCG vaccine and oral anti--hCGvaccine. Eve…